gemstone

Dyed Blue Agate Slice

Silicon Dioxide (Chalcedony variety), $SiO_2$

Hardness of 6.5 to 7 on the Mohs scale, waxy to vitreous luster, microcrystalline crystal structure (cryptocrystalline quartz), concoidal fracture, specific gravity of 2.58 to 2.64. This specimen features concentric banding enhanced by artificial blue dye.

Identified August 1, 2026More gemstone →

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Physical properties

Formation & geological history

Agates form primarily within cavities of volcanic and metamorphic rocks through the slow deposition of silica-rich groundwater solutions over millions of years.

Uses & applications

Commonly used for decorative home goods, coasters, polished specimens, wire-wrapped jewelry, and metaphysical healing practices.

Geological facts

Agate is one of the most popular stones for tumbling and slicing due to its durable hardness and vibrant banding. The intense blue color in this specimen indicates it has been artificially dyed, which is a common practice in the gemstone market to enhance visual appeal.

Field identification & locations

Easily identified by its translucent concentric bands, waxy luster, and high hardness (scratches glass). Found globally, with major deposits in Brazil, Uruguay, India, and the USA.

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