mineral

Agate with Druzy Quartz

Silicon Dioxide (SiO2)

Hardness: 6.5-7 (Mohs); Color: Multicolored with gray, blue-green, and tan bands; Luster: Vitreous to waxy; Crystal structure: Trigonal/Cryptocrystalline; Cleavage: None; Specific Gravity: 2.58–2.64

Hardness: 6
Color: Multicolored with gray, blue-green, and tan bands
Luster: Vitreous to waxy

Identified May 3, 2026More mineral →

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Physical properties

Formation & geological history

Formed in cavities (vesicles) of volcanic rock or ancient sedimentary formations where silica-rich groundwater deposited layers of microcrystalline quartz over time.

Uses & applications

Used primarily in lapidary arts for jewelry, cabochons, and decorative household items like bookends or polished slabs.

Geological facts

This specimen features 'druzy' quartz, which are the visible tiny sparkling crystals on the surface, indicating the final stage of mineral growth in the cavity.

Field identification & locations

Identify in the field by the distinct banding patterns and waxy luster. Look for it in areas with historical volcanic activity or riverbeds. Collectors value specimens with high color contrast and intact crystal pockets.