What is Jasper?
Jasper is an opaque variety of chalcedony, and it comes in a multitude of colors including red, yellow, and brown. It’s primarily found in India, Russia, and the U.S. Jasper is known for its unique patterns and is often used as a gemstone.
Jasper is a colorful gemstone that comes in various patterns and hues. Its unique appearance makes it a popular choice for jewelry and decorative items, especially beads, pendants, and cabochons.
|Chemical Classification||Inorganic - Silicate (Chalcedony)|
|Color||Many colors including red, yellow, brown, green, and occasionally blue, often mottled or striped.|
|Luster||Dull to vitreous when polished.|
|Occurrence||Worldwide, including significant sources in India, Russia, and the USA.|
|Formation||Usually forms from volcanic ash or fine silicate mud, solidifying over time under heavy pressure.|
|Mohs Hardness||6.5 to 7|
|Specific Gravity||Approximately 2.5 to 2.9.|
|Diagnostic Properties||Opaque, often red or banded.|
|Pleochroism||Does not display pleochroism.|
|Crystal System||Hexagonal (variety of Quartz)|
|Optical Properties||Uniaxial (+)|
|Refractive Index||1.530 - 1.539|
|2V angle||Measured: 78° to 82°|