Sedimentary

Imperial Jasper

Silicon Dioxide (SiO2) - Microcrystalline Quartz with Mineral Inclusions

Hardness: 6.5-7 (Mohs scale), Color: Cream, green, and tan with fine parallel banding, Luster: Vitreous to waxy (when polished), Crystal Structure: Hexagonal (microcrystalline), Cleavage: None (conchoidal fracture), Specific Gravity: 2.58-2.91

Hardness: 6

Identified March 24, 2026More sedimentary →

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Physical properties

Formation & geological history

Formed through the deposition of silica from hydrothermal fluids or percolating groundwater into volcanic ash or sedimentary layers. Primarily formed during the Tertiary period in mountainous volcanic regions.

Uses & applications

Predominantly used for high-end lapidary work, cabochons for jewelry (as seen in the ring), and small decorative carvings. It is highly valued by mineral collectors for its unique 'watercolor' banding patterns.

Geological facts

Imperial Jasper is specifically associated with a deposit found in a canyon roughly 50 miles north of Guadalajara, Mexico. It is characterized by its distinct 'eggs' (vugs) and tight, parallel banding that resembles a painting.

Field identification & locations

Identify in the field by its very fine-grained, opaque texture and characteristic earth-tone banding. Unlike many jaspers which are mottled, Imperial Jasper often shows distinct layers. It is primarily found in Jalisco, Mexico.

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