Amethysts are actually purple/violet colored quartz (In the same way orange quartz are commercially known as citrines). Technically, any other colored quartz would be labeled by its color e.g. pink quartz or green quartz, etc..

But I guess to make the stones sound more marketable, the names are changed up a bit; as labeling yellow quartz as "lemon quartz", clear/colorless quartz as "rock crystal quartz" and brown quartz as "smoky quartz". And then there are the recent transparent pink and green ones recently labeled as "pink amethysts/green amethysts". I suppose it does sound a bit more interesting; and confusing as when one mentions amethysts, you'd expect to see a purple/violet stone.

NEVERTHELESS, upon seeing these special cut pink and green amethsyts...err....quartz..... I knew they'd make for some attractive looking earrings. Sometimes its just so easy to get lost in the jargon.

Detachable pink and green amethyst drops bezel set in rose gold; diamond set hoops in white gold.