metamorphic
Epidote in Matrix (Dragon Stone variant)
Epidote with Quartz/Feldspar (Ca2(Al,Fe)3(SiO4)3(OH))
Hardness: 6-7 on Mohs scale; Color: Dark maroon-brown to black with pistachio green inclusions; Luster: Vitreous to pearly; Crystal structure: Monoclinic; Specific Gravity: 3.3-3.6
- Hardness
- 6-7 on Mohs scale
- Color
- Dark maroon-brown to black with pistachio green inclusions
- Luster
- Vitreous to pearly
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Physical properties
Hardness: 6-7 on Mohs scale; Color: Dark maroon-brown to black with pistachio green inclusions; Luster: Vitreous to pearly; Crystal structure: Monoclinic; Specific Gravity: 3.3-3.6
Formation & geological history
Formed through low to medium-grade regional metamorphism of igneous rocks or in hydrothermal veins. Often found in basaltic rocks where calcium-rich minerals are altered.
Uses & applications
Primarily used for lapidary work, jewelry (cabochons, pendants), and as a collector specimen due to its unique color contrast.
Geological facts
Epidote gets its distinct green color from iron (Fe3+). It is often associated with the mineral piemontite when reddish tones are present, and is famously found in distinctive forms in South Africa and Australia.
Field identification & locations
Identify by looking for the 'pistachio green' streaks or veins against a darker red or black matrix. Commonly found in metamorphic terrains such as those in Norway, South Africa, and the USA.
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