prasiolite
Sign in to savePrasiolite (also known as green amethyst or vermarine) is a green, transparent variety of quartz that derives its color from the presence of ions within the crystal structure. Prasiolite is not the only green variety of quartz, and it should not be confused with prase, chrysoprase, chrome chalcedony, or quartz colored by inclusions of chlorite or epidote.
Key facts
- Mineral.name
- Prasiolite
- Mineral.category
- Tectosilicate minerals
- Mineral.group
- Quartz group
- Mineral.IMAstatus
- Variety of quartz
- Mineral.boxbgcolor
- darkgreen
- Mineral.boxtextcolor
- ffffff
- Mineral.image
- Prasiolite from Poland.jpg
- Mineral.imagesize
- 260px
- Mineral.caption
- Natural prasiolite from Różana, Nowy Kościół, Lower Silesian Voivodeship, Poland
- Mineral.color
- Shades of green
- Mineral.mohs
- 7 – lower in impure varieties
- Mineral.diaphaneity
- Transparent
- Mineral.fracture
- Conchoidal
- Mineral.tenacity
- Brittle
- Mineral.refractive
- 1.544 to 1.553
- Mineral.cleavage
- None
- Mineral.gravity
- 2.65
- Mineral.system
- Trigonal
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Prasiolite (also known as green amethyst or vermarine) is a green, transparent variety of quartz that derives its color from the presence of ions within the crystal structure. Prasiolite is not the only green variety of quartz, and it should not be confused with prase, chrysoprase, chrome chalcedony, or quartz colored by inclusions of chlorite or epidote.
thumb|"Green amethyst" prasiolite Natural prasiolite is exceedingly rare, having been first discovered in the early 19th century in Lower Silesia, Poland with only a few other deposits known to exist. Natural prasiolite deposits include Płóczki Górne (Poland), Bahia (Brazil), Thunder Bay (Canada), and Farm Rooisand (Namibia).