mineral

Moss Agate Sphere

Silicon Dioxide (SiO2) with inclusions

AI-generated identification · may be incorrect

Hardness: 6.5-7 (Mohs scale); Color: Deep green with translucent white to gray patches; Luster: Vitreous/Waxy; Crystal Structure: Trigonal (microcrystalline/cryptocrystalline); Specific Gravity: 2.58-2.64

Hardness: 6
Color: Deep green with translucent white to gray patches
Luster: Vitreous/Waxy

Identified July 12, 2026More mineral →

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Physical properties

Formation & geological history

Formed in volcanic rock cavities or through sedimentary processes where silica-rich groundwater deposits microcrystalline quartz. The 'moss' patterns are caused by dendritic inclusions of manganese or iron oxides rather than organic matter.

Uses & applications

Predominantly used for ornamental purposes such as crystal spheres, beads, jewelry, and metaphsyical collecting.

Geological facts

Despite its name, moss agate is not a true form of agate because it lacks the concentric banding typically characteristic of agates. It has been historically known as the 'Gardener's Stone' and was once believed to ensure a bountiful harvest.

Field identification & locations

Identify by looking for green, branching 'moss-like' filaments suspended in translucent chalcedony. Commonly found in India, Brazil, and the USA (notably Montana). For collectors, seek pieces with high transparency and high-contrast 'moss' patterns.