Turquoise comes through Middle English turkeys from Anglo-French turkeise. That form reaches turkeis, Turkish, and Turc, Turk.
The cards compress the masculine/feminine adjective relationship into one step. The adjective explains the name; it does not establish where every turquoise stone was mined.
Sources
- Merriam-Webster: turquoise
Word History gives Turc, turkeis/turkeise, Middle English turkeys and the modern headword.
- Online Etymology Dictionary · turquoise
Meanings of the older forms on the word path.
- Anglo-Norman Dictionary · turkeise
Meanings of the older forms on the word path.