25 GRAM LOT - Carbon Quartz Double Terminated Crystals / 5-35mm Avg jewelry Amazonite is a potassium-based feldspar

Amazonite is a potassium-based feldspar

its surface tarnishes in a variety of minerals including bornite or rarely malachite and azurite

Please allow for variation in size

Multicolored Amethyst Druzy / Medium Flat

The natural aragonite in these fossils instead forms a nacre-like sheen

25 GRAM LOT - Carbon Quartz Double Terminated Crystals / 5-35mm Avg jewelry Amazonite is a potassium-based feldsparOrigin: Afghanistan Pieces measure approximately 5 35mm (AVERAGE SIZE) Carbon Quartz, aka Quartz with Anthraxolite Inclusions, formed in a shallow sea bed millions of years ago. Anthraxolite is a hard, black lustrous graphitic coal composed of fossilized decayed plant material. The picture is an example ONLY. This listing is for a 100% natural product. Please allow for variation in size, shape, color, and formation. Randomly selected gemstones, cherry