American jade
A misleading local name for massive vesuvianite or a rock containing mostly vesuvianite. Except that the material resembles jade, there is no relationship mineralogically. Jade…
Category: Gem or Scam? Library
Amazon jade/stone
Misleading commercial name for amazonite, a green variety of microcline, a mineral in the feldspar group. Amazonite has no relation to jade but calling the…
Ametrine
An accepted name for a yellow-purple variety of quartz, the name being derived from the quartz varieties amethyst and citrine. According to the World Jewellery…
Amechlorite
Unnecessary commercial name for amethyst with chlorite inclusions, by Judy Hall in her 3rd Crystal Guide1 introduced. Do you have a nice example of this…
Amphibole quartz
Trade name for certain quartz crystals with phantoms or inclusions of minerals from the amphibole group in various colors. Also called desirite. See also lodolite.
Ammolite
Commercial name for the iridescent or “opalescent” outer surface of fossilized shell of ammonites, primarily from the Bearpaw Formation in southern Alberta, Canada. Although the…
Amorite
Trade name for ‘druzy’ quartz with chalcedony from Mexico. ‘Druzy’ means a top layer of very small crystals on a fracture surface of a rock,…
Pineapple quartz
Fantasy name used as a synonym for cactus quartz, after its resemblance to a pineapple. Learn more about quartz growthforms? Take the mini course!
Anandalite™
Unregistered commercial name for natural quartz in which rainbow colors occur due to refraction of light on internal fracture surfaces. Other names used for quartz…
Andesine labradorite
Andesine is a natural mineral that, like labradorite, belongs to the feldspar group. Today the market offers gemstones made of andesine (or andesine labradorite) that…
