Mineral

Agate (specifically Carnelian or Honey Agate)

Silicon Dioxide (SiO2)

Hardness: 6.5-7 on the Mohs scale. Color: Translucent orange to honey-yellow. Luster: Waxy to vitreous. Crystal Structure: Trigonal (microcrystalline/cryptocrystalline). Cleavage: None (conchoidal fracture). Specific Gravity: 2.58-2.64.

Hardness: 6
Color: Translucent orange to honey-yellow
Luster: Waxy to vitreous

Identified March 19, 2026More mineral →

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Physical properties

Formation & geological history

Formed as a result of silica-rich groundwater filling cavities or vesicles in volcanic rocks (igneous host). The layers are deposited inward toward the center, often spanning millions of years. This specimen likely originates from the Cenozoic era.

Uses & applications

Extensively used in lapidary work for jewelry, cabochons, and beads. Historically used for cylinder seals and amulets. Today, it is popular among rockhounds for polishing and display specimens.

Geological facts

Agate is a variety of chalcedony characterized by its translucency and fine grain. Because of its hardness and resistance to chemical weathering, it is frequently found as 'river stones' or on beaches long after the parent rock has eroded away.

Field identification & locations

Identification: Look for a waxy texture, conchoidal (shell-like) fractures, and translucency when held to light. Found globally, but prolific in areas with ancient volcanic activity like Brazil, India, and the Pacific Northwest, USA. Collectors should look for unique internal banding or inclusions.

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