mineral
Beryl (likely Aquamarine) in matrix
Be3Al2(SiO3)6 (Beryllium Aluminum Silicate)
Hardness: 7.5-8 on Mohs scale; Color: Pale blue to greenish-blue (aquamarine variety); Luster: Vitreous (glassy); Crystal Structure: Hexagonal (often found as prismatic columns); Cleavage: Imperfect; Specific Gravity: 2.63 - 2.80.
- Hardness
- 7
- Color
- Pale blue to greenish-blue (aquamarine variety)
- Luster
- Vitreous (glassy)
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Physical properties
Hardness: 7.5-8 on Mohs scale; Color: Pale blue to greenish-blue (aquamarine variety); Luster: Vitreous (glassy); Crystal Structure: Hexagonal (often found as prismatic columns); Cleavage: Imperfect; Specific Gravity: 2.63 - 2.80.
Formation & geological history
Formed in granitic pegmatites and metamorphic rocks through hydrothermal activity. The specimen shows crystalline beryl embedded in a dark schist or granitic host rock matrix. Ages can range from hundreds of millions to billions of years depending on the specific pegatite field.
Uses & applications
High-quality transparent crystals are used as gemstones in jewelry. Opaque or lower-grade beryl is an ore for beryllium metal used in aerospace and electronics. Crystalline matrix pieces are popular among mineral collectors.
Geological facts
Beryl is the parent mineral for several famous gemstones, including Emerald (green), Aquamarine (blue/cyan), and Heliodor (yellow). The name 'beryl' is derived from the Greek 'beryllos', which originally referred to blue-green stones.
Field identification & locations
Identify in the field by the hexagonal crystal habit and extreme hardness (it will easily scratch quartz). Look for light blue/green prismatic shapes within coarse-grained granitic rocks or mica schists. Commonly found in Brazil, Pakistan, and the Ural Mountains.
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