Synthetic amethyst is made to imitate the best quality amethyst. Its chemical and physical properties are so similar to that of natural amethyst that it can not be differentiated with absolute certainty without advanced gemological testing (which is often cost-prohibitive). There is one test based on “Brazil law twinning” (a form of quartz twinning where right and left hand quartz structures are combined in a single crystal) which can be used to identify synthetic amethyst rather easily. In theory however it is possible to create this material synthetically as well, but this type is not available in large quantities in the market.
This Flower Basket Charm with diamonds and an amethyst in platinum is from Tiffany Charm. If you get it, you will have your own sparkling style with a fun splash of color. Cabochon amethyst, carat total weight .47; round brilliant diamonds, carat total weight .20. It is $2,050.