Jasper
What is Jasper?
Jasper is an opaque variety of chalcedony, a microcrystalline form of quartz. It is known for its rich and varied colors, patterns, and inclusions. Jasper is found in a wide range of colors, including red, yellow, brown, green, blue, and purple, often with intricate patterns like banding, spotting, or veining. These patterns are created by the presence of various minerals and impurities within the stone. Jasper is a relatively hard and durable gemstone, making it suitable for various uses, including jewelry, carvings, and ornamental objects. It has been used for thousands of years and is valued for its beauty and purported metaphysical properties.
Optical Properties
- Refractive Index
- 1.54 - 1.55
- Birefringence
- None
- Pleochroism
- Absent
- Optical Character
- Isotropic
- Dispersion
- Low
Jasper Market Value Calculator
Estimate the market value of Jasper using size, quality, and finish. This preview calculator is for quick context and is not a formal appraisal.
Jasper Localities Map
See where Jasper is found with a localities map, collecting zones, and geology context. Generate a sample map preview below.
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Quick Facts
Physical Properties
- Color
- Red, yellow, brown, green, blue, purple, and various combinations
- Hardness (Mohs)
- 6.5 - 7
- Density
- 2.58 - 2.91 g/cm³
- Streak
- White
Chemical Properties
- Chemical Formula
- SiO2
- Elements
- Silicon, Oxygen, Iron, Aluminum, Calcium, Sodium, Potassium, Magnesium, Titanium
Also Known As
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