I listed every possible trade good mentioned from Ibn Battuta's Rihia.

[RhoxOS]

tl;dr I listed every possible good and I think the most suitable one from EU4 is Takedda's copper mine.

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Ibn Battuta is famous for traveling most of the Islam nations in the 14th century. Since it's a travel log, Ibn Battuta wrote the specialties of the town he visit. So I listed them, and equivalent trade goods in EU4. It's 100 years before EU4's starting date, and since he mostly focuses on what he eats, I think it was more suitable as something fun to read than a suggestion forum. Some notes before I begin.
1. I used one translated by Jeong Su-il. He was a former North Korean spy, and many of the words are unfamiliar to South Korean like me. Also, the translated text might differ from the English versions.
2. I omitted annotations since the translator did not separate one left by Ibn Juzayy and himself.
3. For the province name used in the first column, I used one that has a Wikipedia page or access to Google maps. If it's a debated one, I also wrote the original name. IDK means I don't know where it indicates.
4. I categorized most of the edible stuff like fruit into grains. Except for Grape.

Province name	Specialty	Possible trade good	Export to	EU4 province name	Trade Good	Province id	Page	Note
Maltim (Baltim)	Palm tree Seabird, al-buri (fish)	Grain or Naval supplies? Fish		Rosetta	Grain	362	59
Damietta	Banana, Sheep, Buffalo milk, al-buri (fish)	Grain, livestock	Banana:Misr (Cairo) Fish: Sham (Syria), al-Rum (Anatolia), Cairo	Damietta	Grain	363	60~61	There is a famous saying about Banana and sheep
Ashmun al-Rumman	Pomegranate	Grain? Wine?	Cairo	Damietta	Grain	363	64
Bush (Nasser)	Flax	Cotton?	Egypt, Ifriqiya (Tunis)	Atifh	Paper	4318?	82
Dalas (IDK somewhere very close to Bush)	Flax	Cotton?	Egypt, Ifriqiya (Tunis)	?			82
al-Bahanasa (Oxyrhynchus)	Fur coat	Fur? Cloth?		Minya	Sugar	2317	83
Mallawi	Sugar	Sugar		Minya	Sugar	2317	85
Manfalut	al-nida (Kind of honey made from wheat)	Sugar	Egypt	Manfalut	Cotton	2319	87
Aydhab	Fish, milk	Fish, Livestock	Import: Grain, date from Upper Egypt	Halaib	Slave	2324	91	Region Egypt, not country Egypt

Province name	Specialty	Possible trade good	Export to	EU4 province name	Trade Good	Province id	page	note
Nabulus	Canarium album (oil), Watermelon Kharrub (Sugar)	Grain? Sugar	Canarium album: Egypt, Damascus Kharrub: Egypt, Damascus, Syria	Jaffa	Sugar	1854	106	Most productive area of the Canarium album in the Sham
Saida (Sidon)	Raisin, Fig, Canarium album	Grain	Egypt	Sidon	Naval Supplies	1855	108
Beirut	Fruit	Grain	Egypt	Sidon	Naval Supplies	1855	109	Ibn battuta's memory problem. Sidon->Tabriye->Beirut route is unlikely
Al Mansuriyah	Almond	Grain		Sidon	Naval Supplies	1855	113	扁桃... Who the heck calls almond 扁桃?
Maarat al-Numan	Fig, Pistachio	Grain	Egypt, Syria	Hama or Aleppo	Cotton Silk	1849 377	114	who the heck calls Pistachio 아월혼?
Sarmin	Soap Canarium album, Cloth	Incense? Grain, Cloth	Soap: Egypt, Syria	Aleppo	Silk	377	115
Halab (Aleppo)	Grape	Wine		Aleppo	Silk	377	118	It's more like 'There are many beautiful grape trees on the outskirts and I'm going to use this as a specialty
Baalbek	Cherry, Grape Jam (More like candy with Pistachio and almond in it) Milk	Sugar Livestock	Milk: Damascus	Sidon or Damascus	Naval Supplies Iron	1855 382	134	I think it's something like Turkish delight
Al-Zabadani	Cloth Dast(Tableware that acts like Matryoshka)			Damascus	Iron	382	134
Damascus	Glass	Glass		Damascus	Iron	382	143	From pages 372~373: Sultan in Mogadishu used rose water from Damascus and cloth from Egypt and Palestine

Province name	Specialty	Possible trade good	Export to	EU4 province name	Trade Good	Province id	page	note
As Safra	Date	Grain		Yanbu or Medina	Cloth Cloth	2329 384	200
Badr	Date	Grain		Yanbu	Cloth	2329	200
Khulais	Date	Grain		Jeddah or Mecca	Incense Incense	2331 385	202	Pilgrims eat sawiq (kind of wheat) in Aqbatu'd Sawiq. However, it's not local stuff, and pilgrims have to buy it from Egypt or Sham
Usfan	Shajaru'l muql (some kind of palm)	Grain		Jeddah or Mecca	Incense Incense	2331 385	202
Marrud Zahran or Batnu Marr (IDK somewhere close to Mecca)	Date	Grain	Fruit and vegetable to Mecca	Mecca	Incense	385	203
Al Taib (IDK somewhere 72km from Mecca), Batan Marr, Nahla? Valley	Fruit, Vegetable	Grain	Mecca	?	?	?	207
al-Saru (IDK somewhere in Yemen)	Grape, Grain	Wine, Grain		?	?	?	246
Sumaira'a	Sheep, Butter, Milk	Livestock		Jabal Shammar	Grain	393	257	Inhabitants approach pilgrims with these items and seek cloth
al-Tha'labiyah (IDK)	Camel, Sheep, Butter, Milk	Livestock		Jabal Shammar	Grain	393	259	Somewhere between Sumaira and Al Mashquq.
al-Marjum (IDK)	Butter, Milk	Livestock		Jabal Shammar	Grain	393	259	"

Province name	Specialty	Possible trade good	Export to	EU4 province name	Trade Good	Province id	page	note
Qadisiyyah	Date	Grain		Samawat	Spice	2311	261
Najaf	Cloth, Spice	Cloth, Spice		Samawat	Spice	2311	265
Basra	Date Sailan (kind of sugar made with date)	Grain		Basra	Salt	408	278	The date is the cheapest here. You can get 14 Iraq ratls with a single dirham
Al-Ubulla	Date	Grain		Basra	Salt	408	282
Isfahan	Mishmish (Apricot), Marmelo (Quince), Grape, Watermelon	Grain		Isfahan	Paper	429	296	Bukhara and Khwarazm's watermelon is also famous Something called Sharihah from the Maghreb is mentioned. The translator suspects it is a fig
Khalil	Apple	Grain		Isfahan or Abarquh	Paper Livestock	429 4171	299	15 Iraq ratls of apple for 1 dirham
Yazd Khas	Cheese	Livestock		Yazd	Paper	433	299	Yazd Khas cheese
Mayin (IDK)	Jauz (Walnut)	Grain		?	?	?	299	Somewhere between Yazd Khas and Shiraz
Kufah	Dried Date, Fish	Grain, Fish		Samawat	Spice	2311	299
Birul Malahah (Al-Kifl)	Date	Grain		Samawat or Baghdad	Spice Cloth	2311 410	322
Hillah	Date	Grain		Samawat or Baghdad	Spice Cloth	2311 410	323
Karbala	Date	Grain		Karbala	Wool	409	324
Tabriz	Gem Incense	Gem Incense		Tabriz	Silk	416	340	luxurious Gem shop, incense shop
Qayyarah	Asphalt (oil)	Naval Supplies?		Mosul	Cloth	411	343
Nusaybin	Rose water	Incense		Mardin or Sinjar	Wool Sugar	4292 2309	346
Mardin	Mardin Cloth (Made with marz; kind of wool)	Cloth		Mardin	Wool	4292	347	There is a possibility for Ibn Batuta's memory problem here. Ibn Batuta wrote: Nusabyn->Sinjar->Mardin->Baghdad Translator suggests: Nusabyn->Mardin->Sinjar->Baghdad

Province name	Specialty	Possible trade good	Export to	EU4 province name	Trade Good	Province id	page	note
Ra's Dawair (IDK)	Al buri (fish)	Fish		Suakin	Slave	1232	360	Somewhere between Halaib and Suakin that looks like a valley
Suakin	Milk product Jarjur (kind of corn)	Livestock Grain	Milk stuff, Jarjur: Mecca	Suakin	Slave	1232	360
Zabid	Date	Grain		Zabid	Coffee	4279	363	They have a date (fruit) celebration day
San'a	Banana	Grain		San'a	Wool	390	363
Zeila	Fish Camel	Fish Livestock		Zeila	Incense	1212	370	It was more like: "Fish and camel blood stinks!"
Mogadishu	Mogadishu Cloth Camel Ghaliyah (kind of incense)	Cloth Livestock Incense	Cloth: Egypt Ghaliyah: Maldive	Mogadishu	Ivory	1205	371 2-252	200 camels killed each day
Mombasa	Banana, Lemon, Citron, Jamun	Grain		Mombasa	Ivory	1202	375
Yufi	Alluvial Gold	Gold		X	X	X	376	The place is mythical. One month away from Sofala
Kilwa	Ivory	Ivory		Kilwa	Gold	1196	377	They bestow ivories often, and gold rarely

Province name	Specialty	Possible trade good	Export to	EU4 province name	Trade Good	Province id	page	note
Zafarul (Ash Shihr)	Horse Fruit, Alas (Wheat), Corn Sardin (fish) Silk Cloth	Livestock Grain Fish Silk Cloth	Horse: India Import: Rice from India	Shihr	Incense	4283	378	Silk and Cloth are of fine quality
Al-Ahqaf (IDK)	Banana Long pepper Narjil (Indian walnut????, they eat it, and make rope, sugar )	Grain Spice		?	?	?	382	Somewhere close to Shihr. See Wikipedia's page for more info (Yes, the Quran-related one) Banana weighs 12 Uqiyyah Narjil sounds something like coconut in the translator's description
Hasik	Lukhm (Fish) Frankincense (Incense)	Fish Incense		Dhofar	Incense	401	386
Tair Island (IDK)	Bird and its egg Shir Mahi (Fish)	Livestock Fish		?	?	?	387	According to the translator's map, it's somewhere around Wusta~Masirah
Masirah	Fish	Fish		Masirah	Bronze	2341	389
Tiwi	Marwari (Banana) Long pepper	Grain Spice	Fruit: Qalhat / Marwari: Hormuz Import: Dates from Oman	Ash Sharqiyah	Spice	4286	393	sidenote: Qalhat imports rice from India
Jarun	Salt Gems	Salt Gems	Import: Dates from Basra and Oman	Hormuz	Gems	2999	395	Al-Darabi Salt. They make sculptures and furniture with it. Pearl is from Qeys island.
Siraf	Gems	Gems		Siraf	Spice	4332	401	Ibn Batuta thought Qeys island and Siraf were the same places. Pearl from the Persian Gulf
Bahrain	Gems Date, pomegranate, Citron, Lemon Cotton	Gems Grain Cotton		Awal	Gems	394	401, 402	Pearls from the Persian Gulf Bahrain in these times is also used to indicate eastern Arabia. However, Ibn Batuta said Bahrain became an island. Meaning Ibn Batuta used Bahrain to indicate Awal
Qatif	Gems Date	Gems Grain		Qatif	Fish	394	401, 403	Perls from the Persian Gulf
Hofuf	Dried Date	Grain		Hofuf	Spice	2347	403	World's biggest dried date producer
Land of Al-Bujah	Sheep	Livestock		Suakin	Slave	1232	406	Somewhere between Ra's Dawair Aydhab
Masqat	Qulbul mas	Fish		Masqat	Gems	400	2-355	On his way return to home Translator says this Masqat is different from Oman's Masqat, but I'm not so sure about that

Province name	Specialty	Possible trade good	Export to	EU4 province name	Trade Good	Province id	page	note
Alanya	Wood	Naval Supplies	Wood: Egypt including Alexandria, Dumyat	Icel	Naval Supplies	2302	413
Antalya	Qamar al-Din (Apricot)	Grain	Qamar al-Din: Egypt	Teke	Cotton	2298	414
Denizli	Cloth	Cloth		Denizli	Cloth	4308	420
Konya	Qamar al-Din (Apricot)		Qamar al-Din: Egypt, Sham	Konya	Salt	323	425	Questionable visit
Aksaray	Grape Cloth made out of Wool and Silk	Wine Cloth, Silk	Wool-Silk Cloth: Sham, Iraq, India, China, Turkey (Central Asia)	Aksaray	Livestock	4307	427
Niğde	Fruit			Aksaray?	Livestock	4307	428
Gümüşhane	Silver	Gold		Erzincan?	Copper	2305	431
Erzincan	Cloth Copper	Cloth Copper		Erzincan	Copper	2305	431
Erzurum	Grape	Wine		Erzurum	Livestock	331	432
Selçuk	Grape	Wine		Sugla	Cotton	318	439
İznik	Jauz, Qastal (Chestnut) Grape	Grain Wine		Kocaeli	Grain	316	446
Göynük	Saffran	Spice		Kocaeli or Sultanonu	Grain Cloth	316 4312	449

Region	Province name	Specialty	Possible trade good	Export to	EU4 province name	Trade Good	Province id	page	note
Black Sea Area	Azov	Akadish Horse	Livestock	Horse: India	Azov	Slave	286	473	More like throughout the Central Asia area rather than Azov specifically A fine horse is only 50~60 dirham = 1 Magrheb dinar 6,000 horses are sent to India in a single time In India, even a bad horse costs 100 dinars == 25 Maghreb dinars or 100 dinars A fine horse costs 500 dinars Horses for horse racing in India are imported from Yemen, Oman, and Persia. They cost 1,000~4,000 dinars
Black Sea Area	Al-Julmah (IDK)	Furs of Sammur (sable), Squirrel, Gagum (ferret)	Fur	Fur: From Bolghar to India, China, Persia, Iraq	X	X	X	487	Mythical. Even Ibn Battuta visiting Bolghar is very doubtful by itself. Ferret: 1,000 dinars == 250 Maghreb dinars in India Squirrel : 400 dinars
Black Sea Area	Astrakhan	Livestock	Livestock		Astrakhan	Wool	464	492
Black Sea Area	Akak or Locachi (IDK)	Silver	Gold		?	?	?	493	Somewhere near Azov
Black Sea Area	Ahtopol	Grape Plum, Apple, Quince	Wine Grain		Kirkkilise	Salt	1764	496
Black Sea Area	Constantinople	Spice Market	Spice		Constantinople	Glass	151	503

Province name	Specialty	Possible trade good	Export to	EU4 province name	Trade Good	Province id	page	note
Termez	Wheat, Barley	Grain	Wheat, Barley: Khwarazm	Termez	Livestock	4343	516
Khwarazm (Konye-Urgench)	Watermelon	Grain	Dried Watermelon: India, China	Gurganj	Wool	2362	296, 522	In Iben Battuta's opinion, this has the best dried fruit in the world
Wabkanah (Vobkent?)	Grape al-alu (Dried Fruit, Aloo Bukhara?)	Wine Grain	al-alu: India, China	Bukhara	Salt	442	525
Nasaf (Qarshi)	Grape Quince Meat, Milk	Wine Grain Livestock		Qarshi	Cotton	453	545	They wash their hair with milk
Badakhshan	Lapice Lazuli	Gem		Badakhshan	Gem	452	546
Marghis Desert (IDK)	Pistachio	Grain	Pistachio: Iraq	?	?	?	551	More like I've heard a story like this
Torbat-e Jam	Mulberry, Silk	Silk		Ghuriyan	Livestock	4324	555	Part of the doubtful trail
Mashhad	Fruit, Grain	Grain		Mashhad	Bronze	2221	556	Part of the doubtful trail
Nishapur	Cloth including silk	Silk, Cloth	Cloth including silk: India	Nishapur	Gem	4326	558	Part of the doubtful trail
Panjshir Valley	Balkhash (kind of Gem)	Gem		Kabul	Gem	451	561
Sharkay	Fruit	Grain		Jalalabad	Livestock	2226	562

Region	Province name	Specialty	Possible trade good	Export to	EU4 province name	Trade Good	Province id	page	note
India	Sehwan	Fish Buffalo milk	Fish Livestock		Sehwan	Silk	505	18
India	Delhi	Grape Sugar Kiyar & Qiththa (Cucumber), Watermelon	Wine Sugar Grain		Delhi	Silk	522	31, 45	The only place that grows grapes in entire India is Delhi. Other stuff is more like they existed. At least Ibn Battuta said watermelon was small but delicious
India	Sirsa	Rice	Grain	Rice: Delhi	Samana	Cloth	4411	37
India	Kara	Wheat, Rice Sugar Cloth	Grain Sugar Cloth	Luxurious Cloth: Delhi	Lucknow	Glass	523	59	Ibn Battuta says as if Mankabur and Kara a set. But if Mankabur is Mankapur, there are very far away This was a part of a story about Alauddin Khalji
India	Aligarh	Mango	Grain		Feyzabad	Cloth	4495	200
India	Marh (Mehgaon?)	Wheat	Grain	Wheat: Delhi	Gird	Dyes	525	211
India	Zihar (Dhar?)	Grain, Especially Wheat Long Pepper	Grain Spice Grain	Long Pepper: Delhi	Mandu?	Dyes	526	218	Watermelon is Governor's (who is from Maldieve) specialty
India	Daulatabad	Gems Trade Grape Pomegranate	Gems Wine Grain		Daulastabad	Paper	545	221	Suq Tarb Abad (Singer Market) does not sound like a slave market. But I could be wrong
India	Sagar (Songarh?)	Mango, Banana Sugar	Grain Sugar		Gohilvad	Salt	2051	222
India	Barkur	Sugar	Sugar		North Kanara or South Kanara	Spice Tropical Wood	531 2029	234
India	Mangalore	Black Pepper, Ginger	Spice	Most of the Merchants from Yemen and Persia comes to here	South Kanara	Tropical Wood	2029	235
India	Dahfatan (Koyilandy?)	Coconut, Qulqas (Taro root), Banana Black Pepper, Long Pepper, Areca catechu	Grain Spice		Cannanore or Calicut	Spice Spice	4413 534	237	Best banana-producing province in the area
India	Budfatan (Badagara?)	Areca catechu	Spice	Areca catechu: India, China	Cannanore or Calicut	Spice Spice	4413 534	239
India	Calicut	Black Pepper	Spice	Merchants from China, Java, Maldives, Yemen, Persia	Calicut	Spice	534	234, 240	Although Calicut is described as the biggest port, Black Pepper applies to all of the Malabar areas
India	Kunja Kari (Kochin?)	Cinammon Brazil Tree	Spice Tropical wood		Kochin	Spice	535	244
India	Shaliyat (Chaliyam?)	Cloth	Cloth		Calicut	Spice	534	249
India	Maldives	Coconut Qulbu'l mas (kind of Fish that looks like lirun), Sardine Cowrie Shell	Grain Fish Gems	Qulbu'l mas: India, China, Yemen Qanbar (palm fabric): India, China, Yemen Anonymous exports: Coconut, Cloth (Towel, turban, Wilya, etc...), Imports sheep from Malabar, Mogadishu, Madurai Imports Sardine from Kollam	Maldives	Gems	1248	250, 254	As you can see in the Kongo mission, EU4 devs choose to represent cowrie shell as a Gem. Maldives: 1 Dinar=400k~1m cowrie shells. Mali, Juju: 1 Dinar=1,150 cowrie shells
India	Sawid	Anli (kind of Proso millet)	Grain		Maldives	Gems	1248	250	The only place in Maldives that produce grain
India	Muluk	Pomegranate	Grain		Maldives	Gems	1248	31, 275
India	Puttalam	Cinnamon Brazil Tree al-'audu'l hindi (Indian agilawood) Pearl	Spice Tropical wood Incense Gems	Cinnamon: Malabar, Madurai	Salavata	Spice	4408	277	There are so many cinnamon trees that merchants take Cinnamon without paying anyone Pearl is more about gathered throughout from Sultan's domain rather than Puttalam exclusive
India	Chilaw	Elephant	Ivory	Young Elephant: India	Salavata or Kotte	Spice Spice	4408 572	1-313, 2-279
India	Kurunegala	Ruby	Gems		Kandy	Gems	2099	280	Ruby is abundant throughout the Ceylon island
India	Fattan (Pattinam)	Grape Pomegranate	Wine Grain		Negapatam or Tranqebar	Cloth Cloth	4415 4416	295
India	Bengal region	Rice	Grain		-	-	-	301	Rice only costs 1 silver dinar per 25 Delhi ratl

Province name	Specialty	Possible trade good	Export to	EU4 province name	Trade Good	Province id	page	note
al-Barahnakar (Andamans)	Banana Long Pepper, Areca catechu	Grain Spice	Sells the following things to sailors: Banana, Rice, Long Pepper, Areca catechu, Fish	The Andamans	Spice: 20%	574	308	The translator suggests this province could be Arkhan also
Sumutrah (Samudera Pasai)	Frankincense, al-'audu'l hindi Coconut, Shaki, Barki, Mango, Jamun, Narinj Hilwa (Mandarin) Areca catechu Clove Camphor tree	Incense Grain Spice Clove Tropical wood		Pasai	Spice	2673	310~311	All of Java rather than
Qaqulah (Kelatan)	Agilawood	Incense		Terengganu	Fish	2393	316~317	Agilawoods cost the same as firewood here
Qamarah (Khmer)	Agilawood	Incense		-	-	-	316

Province name	Specialty	Possible trade good	Export to	EU4 province name	Trade Good	Province id	page	note
Zaitun (Quanzhou)	Chinaware Kamkha, Atlas (Silk)	Chinaware Silk		Quanzhou	Tea	1829	323, 328	One of the two places that only produces Chinaware
Sin Kalan (Canton)	Chinaware	Chinaware	Chinaware: China, India, Yemen, Maghreb	Canton	Incense	667	323, 330	One of the two places that only produces Chinaware
al-Khansa (Hangzhou)	Silk Weapon Cloth Dast (some kind of tableware dish)	Silk Iron Cloth Chinaware		Hangzhou	Silk	684	338

Province name	Specialty	Possible trade good	Export to	EU4 province name	Trade Good	Province id	page	note
Malaga	Grape al-Mursa'l Yaquti (Special Pomegranate), Fig, Almond Gilded Pottery	Wine Grain Chinaware	Fig, Almond: Egypt, Maghreb Gilded Pottery: Border area	Malaga	Salt	4546	383
Vélez-Málaga	Grape Fig	Wine Grain		Malaga	Salt	4546	384
Meknes	Olive	Grain		Meknes	Cloth	2467	389
Sijilmasa	Iiran (Special Date)	Grain		Tafilalt	Gold	346	389

Province name	Specialty	Possible trade good	Export to	EU4 province name	Trade Good	Province id	page	note
Taghaza	Salt	Salt	Imports date, camel meat from Sijilmasa and anli from Mali	Taudeni	Salt	1128	389	Ibn Batutta said the trade amount of salt is several qintars (44,928kg). But it just means 'many' in Islam culture
Oualata	Sheep meat Coconut, Watermelon	Livestock Grain	Imports luxurious cloth from Egypt	Hodh	Wool	2247	394	They have some coconuts and plants watermelons in the tree's shade
Dioura	Anli	Grain	Anli: Oualata	Segu or Massina	Grain Grain	1123 1131	397
Gao	Rice Milk, Chicken, Inani (Wild Duck) Fish	Grain Livestock Fish		Gao	Cloth	1133	417
Takedda	Copper	Copper	Copper: Gobir, Dioura, Borno, Jaujarah (IDK), al-Muwartabin (IDK) Imports cloth from Egypt	Azbin	Salt	2272	419,420
Borno	Slave Saffran Dyed Cloth	Slave Cloth	Slave, Saffran Dyed Cloth: Takedda	Borno	Grain	1157	420
Bouda	Date, Grasshopper	Grain	Imports every grain from Maghreb	Tuat	-	1127	423	It tastes bad in Ibn Battuta's opinion

EDIT: Paradox forum was changing Rice: Delhi into Riceelhi

 

[JohnyCage]

Wow. Respect for the massive amount of work you have done!

 

[filsch]

Nice work. Should be an achievement to own all of these provinces while being Muslim

 

[PDXBigBoss]

This is very impressive work!

 

[EarlKonrad]

Very cool. How long did it take for you to compile this list btw?

 

[RhoxOS]

Very cool. How long did it take for you to compile this list btw?

About 3 days I believe?

 

[Junuxx]

Great work!

Based on this I'd say it might be worth it to include fruits as a trade good, as a bit higher priced agricultural good than grain.

 

[gigau]

Impressive work !!!

 

[RhoxOS]

Since this post has been moved to the suggestion forum from the normal forum I just want to make sure why I have put it in the normal forum in the first place. It was not meant to break the rules. I think this list should be something fun to read or a reference at best, rather than a 'This province should have this trade goods' list. There are several reasons why I thought so.


To use the trade good appear in Ibn Battuta's travel log, this condition should be met IMO
1. It should be an exciting change for players
Changing cloth or silk to grain isn't exciting unless there is going to be a special modifier like 'Granary of the Mediterranean'
2. History sources of that province must be scarce.
2.1 It's a record 100 years before the EU4's starting date.
2.2 Some of Ibn Battuta's travel records are very dubious. (North China is the perfect example of this. Ibn Battuta recorded something that happen 20 years 'after' his departure.)
3. Ibn Battuta's description of trade goods in that province must be impactful to the region.
Some of them are on the level of 'There are lots of grape trees here.'

The province that matches all these three at most is copper in Takedda IMO. To match things perfectly, West Africa has no copper mines in it. However, EU4's province that covers Takedda is Azbin and that province's trade good is salt. As we all know, salt and its trade route in Africa are very important, and even Songhai's mission tree is affected by it.

If so, simply changing the trade goods into salt won't work and another measure needs to be made to add the Takedda copper mine. Changing the border is not a good solution since the province next to it is Air, which has iron trade goods that West Africa only has 3 of them. Adding another province could be a solution, but the devs already said they won't add another province.

As a result, while I do put out lots of province lists with trade goods, I want none of them to change into one I noted. So I put it in the normal forum rather than a suggestion forum.

PS Upon reading the first line again, I do sound like 'Add Takedda copper mine!' oops.