Moss Agate
Quartz (variety Agate) containing inclusions of Manganese or Iron oxides · Semi-Precious Gemstone / Decorative Stone
Crystal System
Trigonal symmetry; typically appears in a microcrystalline (cryptocrystalline) habit
Mineral Group
Silicates; Tectosilicate subgroup; Chalcedony variety
Chemical Formula
SiO2 (Silicon Dioxide) with dendritic inclusions of Fe, Mn, or Chlorite
Formation Process
Hydrothermal; formed as silica-rich fluids deposit in vesicles of volcanic rock at low temperatures, with metallic oxides providing the moss-like inclusions
About This Crystal
Translucent to semi-opaque white or colorless chalcedony featuring dark green, brown, or black dendritic inclusions that resemble moss, trees, or vegetation. This specimen is carved into a small mushroom shape with a polished vitreous luster.
Physical Characteristics
Color consists of a milky white base with green/black inclusions; white streak; no cleavage; conchoidal fracture; specific gravity 2.58–2.64; non-fluorescent; brittle tenacity.
Optical Properties
Refractive Index 1.530–1.543; uniaxial positive; translucent to opaque; no pleochroism or dispersion; exhibits no significant optical phenomena.
Hardness & Durability
Origin Region
Notably found in India (Gujarat), USA (Montana, Wyoming), Brazil, and Uruguay; formed in volcanic rock cavities
Hardness & Durability
Mohs hardness of 6.5 to 7; tough and durable enough for daily jewelry wear; no cleavage makes it resistant to easy splitting.
Care & Maintenance
Safe to clean with warm soapy water and a soft brush; avoid harsh chemicals and extreme temperature changes which may cause cracking; stable in sunlight.
Rarity & Value
Common; widely available and affordable. Value is determined by the complexity and beauty of the 'moss' patterns rather than carat weight; rarely treated.
Special Characteristics
Exhibits pseudofossils (dendrites) that appear organic but are strictly mineralogical; these patterns are unique to every individual stone.
Lore & History
Historically known as the 'Gardener's Stone' in agricultural societies; believed in folklore to ensure a bountiful harvest. In metaphysical traditions, it is associated with the Heart Chakra and symbolizes new beginnings and grounding.