Herderite is a rare collector’s gem, typically found in smaller sizes. This mineral occurs in green, bluish green, white, colorless, yellowish, or gray. Herderite was first discovered in Germany in 1828, but Brazil is today's dominant source. Collectors treasure herderite for cyclic and “fishtail” twinned crystals. Some specimens exhibit phosphorescence when exposed to X-rays.
- Optical Properties
- Characteristic Physical Properties
- Chemistry & Crystallography
LWUV: Inert to weak yellowish white
Countries of Origin
Myanmar; Argentina; Russian Federation; Viet Nam; Czechia; United States of America; United Kingdom of Great Britain and Northern Ireland; Spain; Austria; Sweden; Pakistan; Unknown; China; Namibia; Finland; Brazil; Italy; Germany