gemstone

Chalcedony (Pancawarna / Bacan / Red Chalcedony Agate Ring)

Silicon dioxide (SiO2)

Hardness of 6.5 to 7 on the Mohs scale, waxy to vitreous luster, translucent to opaque transparency, trigonal crystal system (microcrystalline quartz), conchoidal fracture, and specific gravity of 2.58-2.62.

Identified August 7, 2026More gemstone →

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Physical properties

Formation & geological history

Formed in low-temperature environments through the deposition of silica-rich groundwater filling cavities, veins, or fractures in volcanic and sedimentary rocks.

Uses & applications

Widely used in jewelry, cabochons, rings, and as a popular ornamental gemstone, especially culturally significant in Southeast Asia.

Geological facts

In regions like Indonesia (around Java/West Java indicated by the coordinates), various forms of local chalcedony and agate such as Pancawarna or Red Chalcedony are highly prized by collectors and traditional ring wearers.

Field identification & locations

Identified by its smooth polished cabochon surface, waxy luster, microcrystalline structure, and characteristic translucent red and white banding or coloration. Common in volcanic regions worldwide.

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