sedimentary

Fancy Jasper (Agate/Chert mix)

Silicon Dioxide (SiO2) with various inclusions

Hardness: 6.5-7 Mohs; Color: Mottle dark green, red, and yellow; Luster: Waxy to dull (unpolished); Crystal structure: Microcrystalline/Cryptocrystalline; Cleavage: None (conchoidal fracture); Specific Gravity: 2.6-2.65

Hardness: 6
Color: Mottle dark green, red, and yellow
Luster: Waxy to dull (unpolished)

Identified July 14, 2026More sedimentary →

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Physical properties

Formation & geological history

Formed as a result of silica-rich fluids precipitating in the cavities or veins of sedentary or volcanic rock environments. The various colors come from hematite (red), iron oxides (yellow), and chlorite (green) inclusions.

Uses & applications

Primarily used for lapidary work, jewelry making (beads and cabochons), carvings, and as decorative pocket stones or healing crystals.

Geological facts

Fancy Jasper is often called the 'Stone of Tranquility.' It is a variety of chalcedony that combines multiple colors in one specimen, making each piece unique depending on the mineral impurities present during formation.

Field identification & locations

Identify by its multicolored 'mottled' look, extreme hardness (it will scratch glass), and smooth, waxy feel. It is commonly found in India, Brazil, and Africa. Collectors should look for sharp color contrast.

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