One of a gem cutter’s tasks is to make a finished product with even color. Other names for green quartz are vermarine or lime citrine.Īmethyst frequently shows color zoning, with the most intense color typically found at the crystal terminations. Green quartz is sometimes incorrectly called green amethyst, which is a misnomer and not an appropriate name for the material, as the proper terminology is prasiolite. These pale colors were once considered undesirable, but have recently become popular due to intensive marketing.
‘Rose de France’ is defined by its markedly light shade of the purple, reminiscent of a lavender/ lilac shade. The ideal grade is called "Deep Siberian" and has a primary purple hue of around 75–80%, with 15–20% blue and (depending on the light source) red secondary hues. High quality amethyst can be found in Siberia, Sri Lanka, Brazil, Uruguay, and the Far East. Amethyst may exhibit one or both secondary hues, red and blue. The hardness of the mineral is the same as quartz, thus making it suitable for use in jewelry.Īmethyst occurs in primary hues from a light lavender or pale violet, to a deep purple.
Amethyst is a purple variety of quartz (SiO 2) and owes its violet color to irradiation, impurities of iron and in some cases other transition metals, and the presence of other trace elements, which result in complex crystal lattice substitutions.
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