mineral
Quartz with Tourmaline
Silicon Dioxide with complex boro-silicate (Quartz: SiO2)
Hardness: 7 on Mohs scale; Color: White to transparent quartz with dark green to black tourmaline inclusions; Luster: Vitreous to greasy; Crystal Structure: Trigonal (quartz), Hexagonal (tourmaline); Cleavage: None (conchoidal fracture); Specific Gravity: 2.65 for quartz
- Hardness
- 7 on Mohs scale
- Luster
- Vitreous to greasy
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Physical properties
Hardness: 7 on Mohs scale; Color: White to transparent quartz with dark green to black tourmaline inclusions; Luster: Vitreous to greasy; Crystal Structure: Trigonal (quartz), Hexagonal (tourmaline); Cleavage: None (conchoidal fracture); Specific Gravity: 2.65 for quartz
Formation & geological history
Formed in hydrothermal veins and pegmatites during cooling of magmatic fluids, often over millions of years.
Uses & applications
Used in mineral collecting, crystal healing, lapidary arts, and sometimes decorative items.
Geological facts
Quartz is one of the most abundant minerals in the Earth's crust, and when it grows together with fibrous or prismatic tourmaline, it forms striking and sought-after crystal specimens.
Field identification & locations
Easily identified by its hard quartz matrix combined with dark prismatic mineral inclusions. Found worldwide in pegmatites and hydrothermal vein deposits.
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