mineral

Dyed Agate

Silicon Dioxide (SiO2) - variety Chalcedony

Hardness: 6.5-7 (Mohs scale), Color: Cobalt blue and greenish-brown (artificially dyed), Luster: Vitreous to waxy, Crystal Structure: Trigonal (microcrystalline), Cleavage: None/Conchoidal fracture, Specific Gravity: 2.60-2.65

Hardness: 6

Identified April 13, 2026More mineral →

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Physical properties

Formation & geological history

Formed in volcanic and metamorphic environments as silica-rich water fills cavities in rock. This specific specimen has been tumbled and artificially dyed to achieve its intense colors.

Uses & applications

Decorative items, tumbled stones for collectors, jewelry (beads/cabochons), and metaphysical uses.

Geological facts

Agate is one of the most common materials used for lapidary work. Most bright neon-blue or purple agates found in shops are dyed, as these colors rarely occur so intensely in nature.

Field identification & locations

Identify in the field by its banded appearance and waxy luster. In retail settings, look for 'pooling' of color in cracks, which indicates artificial dyeing.

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Mineral/Rock

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