metamorphic
Quartz with Chlorite or Hornblende inclusions
Silicon dioxide (SiO2) with phyllosilicate or amphibole inclusions
Hardness: 7 (Quartz) and 2-3 (Chlorite area); Color: White/Translucent with dark green/grey mottling; Luster: Vitreous to dull; Crystal Structure: Hexagonal (Trigonal); Cleavage: None/Conchoidal for quartz, Basal for chlorite
- Hardness
- 7 (Quartz) and 2-3 (Chlorite area)
- Color
- White/Translucent with dark green/grey mottling
- Luster
- Vitreous to dull
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Physical properties
Hardness: 7 (Quartz) and 2-3 (Chlorite area); Color: White/Translucent with dark green/grey mottling; Luster: Vitreous to dull; Crystal Structure: Hexagonal (Trigonal); Cleavage: None/Conchoidal for quartz, Basal for chlorite
Formation & geological history
Formed in hydrothermal veins or through low-grade metamorphism of pre-existing rocks. The quartz precipitates from silica-rich fluids while capturing green minerals like chlorite or hornblende during growth. Common in Alpine-type veins.
Uses & applications
Used primarily as decorative stone, aquarium gravel, or as metaphysical 'healing' crystals. Historically used for carving into ornaments or beads.
Geological facts
The dark green inclusions often resemble underwater moss or algae, giving it the nickname 'Phantom Quartz' if the green minerals outline a crystal shape. Quartz is one of the most abundant minerals on Earth's crust.
Field identification & locations
Identify by its hardness (the white part should scratch glass) and the distinctive 'mossy' or 'streaky' green interior. Commonly found in riverbeds near metamorphic mountain ranges.
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