sedimentary

Blue Moss Agate

Silicon Dioxide (SiO2) with mineral inclusions

Hardness: 6.5-7 on Mohs scale; Color: Dusty blue with dark green or brown moss-like inclusions; Luster: Vitreous to waxy; Crystal structure: Hexagonal (trigonal) - microcrystalline; Specific gravity: 2.58-2.64

Hardness: 6
Color: Dusty blue with dark green or brown moss-like inclusions
Luster: Vitreous to waxy

Identified May 9, 2026More sedimentary →

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Physical properties

Formation & geological history

Formed via the deposition of silica from groundwater in cavities within igneous rocks. The blue hue and moss-like patterns come from manganese and iron oxide inclusions trapped during formation. Most common in volcanic regions.

Uses & applications

Used primarily in lapidary arts, jewelry (cabochons, beads), and as ornamental display pieces like towers or wands. Often used in metaphysical practices.

Geological facts

Unlike most agates, Moss Agate is not banded. The 'moss' patterns are actually dendritic mineral inclusions that resemble plants but are purely inorganic.

Field identification & locations

Identified by its translucency and characteristic dendritic, plant-like inclusions. Found frequently in India, Brazil, and parts of the USA. Collectors look for high contrast between the blue base and detailed moss patterns.

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