Wait, so are you saying that the gold that Europeans got in Alexandria sparked the Renaissance?

Regardless, it's not true. Europeans had been acquiring sub-Saharan gold via markets in the Maghreb for centuries.

There are a number of sources that will corroborate this. I suppose there's The Golden Trade of the Moors, but for a less orientalist perspective, you could look at Valerien's history of Bougie, which contains a pretty lengthy section on the trans-Saharan gold trade.

Sounds like someone's misunderstanding the origins of the European price revolution of the sixteenth and seventeenth centuries, which resulted from the exploitation of vast New World silver mines by the Spanish monarchy. The glut of silver led to massive inflation and economic collapse in Spain but tremendous economic growth elsewhere in Europe, particularly in places like the Netherlands which had the financial know-how to capture these new liquidity flows. One result of this was the so-called Dutch Golden Age of the seventeenth century, which gave us painters like Rembrandt and Vermeer.