they will often appear bright orange

and pieces sometimes hold tiny inclusions of ancient plant matter frozen at the moment of entombment

Citrine is yellow to amber iron-bearing quartz whose warmth comes from geological heat in sedimentary environments

Amethyst is violet quartz colored by trace iron and natural irradiation

The flat-base format makes this a practical shelf or desk object with no additional hardware

Watermelon Tourmaline Faceted Sterling Silver Earrings Oval they will often appear brightPink at the center, green at the rimthe color zoning visible through the facets like a cross section of fruit. Watermelon tourmaline is a color zoned elbaite tourmaline in which the core of the crystal grows pink or red (from manganese) while the outer zone grows green (from iron), producing the characteristic concentric color pattern. This zoning develops as trace element concentrations shift in the surrounding pegmatitic fluid during crystal growth.