Lonsdaleite (diamond)
The name lonsdaleite is an officially recognized mineral name for a rare form of carbon but is regularly used online and at trade shows for…
Category: Gem or Scam? Library
Heinekenite
Commercial (and comical) name for green glass. The name heinekenite occasionally pops up in collecting circles and online forums as a playful designation for green…
Quartz, synthetic / lab-grown
Although the mineral quartz is one of the most common minerals on earth and is found in large quantities, synthetically manufactured quartz also exists. This…
Peanut obsidian
Commercial name for orbicular perlite from Mexico, actually a “devitrified” obsidian, also known as red snowflake obsidian and also sold under the name Peanut Obsidian.…
African bloodstone
Commercial name for a green-gray chalcedony with delineated pieces of red jasper and light gray chalcedony, often combined with speckles of pyrite. The stone consists…
Seftonite
Name for a translucent, moss-green variety of chalcedony, but used as a commercial name for a green-gray chalcedony from Africa with angular pieces of red…
Praetorianite
Commercial name for a massive variety of grossular, a green mineral from the garnet group. Named for Pretoria, the administrative capital of South Africa, where…
Nundorite
Local (lapidary-commercial) name for a unique rock with a distinctive appearance: a fine matrix in beige to brown with scattered, often oval crystals of pale…
Kobyashevite
Official mineral name for a rare copper sulfate with the formula Cuâ‚…(SOâ‚„)â‚‚(OH)₆ – 4Hâ‚‚O. It usually forms blue-green to turquoise-colored crystals with a glassy luster.…
Cotton Candy agate
Commercial name for a natural combination of pink jasper and white agate from Mexico. This variegated pink and white stone is marketed under names such…
