gemstone
Blue Agate Slice
Chalcedony (SiO2)
Hardness: 6.5-7 on the Mohs scale; Color: Dyed blue with white/grey bands; Luster: Vitreous to waxy; Crystal structure: Microcrystalline (trigonal); Cleavage: None; Specific gravity: 2.58-2.64
- Hardness
- 6
- Color
- Dyed blue with white/grey bands
- Luster
- Vitreous to waxy
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Physical properties
Hardness: 6.5-7 on the Mohs scale; Color: Dyed blue with white/grey bands; Luster: Vitreous to waxy; Crystal structure: Microcrystalline (trigonal); Cleavage: None; Specific gravity: 2.58-2.64
Formation & geological history
Formed by the deposition of silica from groundwater in the cavities of igneous and sedimentary rocks, often resulting in concentric banding over millions of years.
Uses & applications
Used primarily for decorative objects, jewelry, coasters, and metaphysical healing collections.
Geological facts
Agate is one of the most popular and varied forms of chalcedony. The vibrant blue color in this specimen indicates it has been artificially dyed, which is a common practice to enhance its aesthetic appeal.
Field identification & locations
Easily identified by its distinctive banded patterns and translucent edges, usually found worldwide wherever silica-rich volcanic or sedimentary rocks weather.
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