sedimentary

Jasper or Agate with Chlorite Inclusions

Silicon Dioxide (SiO2) with Chlorite group minerals

AI-generated identification · may be incorrect

Hardness: 6.5-7 (Mohs); Color: Tan/yellow exterior with green mossy or circular blue-green inclusions; Luster: Waxy to vitreous; Crystal structure: Trigonal (Microcrystalline); Cleavage: None

Hardness: 6
Luster: Waxy to vitreous

Identified June 14, 2026More sedimentary →

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Physical properties

Hardness: 6.5-7 (Mohs); Color: Tan/yellow exterior with green mossy or circular blue-green inclusions; Luster: Waxy to vitreous; Crystal structure: Trigonal (Microcrystalline); Cleavage: None

Formation & geological history

Formed through the deposition of silica from groundwater in cavities of volcanic rocks or sedimentary layers. The green coloring is typically derived from chlorite or hornblende minerals trapped during formation.

Uses & applications

Commonly used for lapidary work, cabochons for jewelry, decorative stones, and as a pocket stone for collectors.

Geological facts

Jasper and Agate are both varieties of chalcedony; jasper is opaque while agate is translucent. These stones are often called 'Moss Agate' or 'Ocean Jasper' depending on the specific patterns and locality.

Field identification & locations

Identify by its hardness (will scratch glass) and smooth, water-worn texture. Commonly found in riverbeds or coastal areas where volcanic activity occurred historically.