mineral

Red jasper with druzy quartz

Jasper (microcrystalline quartz, SiO₂), locally coated or veined with crystalline quartz

AI-generated identification · may be incorrect

Opaque brick-red to salmon material with a fine microcrystalline texture, earthy-to-dull luster, and scattered sparkling gray-white druzy quartz. Quartz hardness is about 7 Mohs; jasper has no visible cleavage and typically breaks conchoidally or irregularly; specific gravity is approximately 2.6.

Identified August 19, 2026More mineral →

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Physical properties

Formation & geological history

Jasper forms when silica-rich fluids replace or cement volcanic ash, sediment, or altered rock, with iron oxides producing the red color. The specimen likely includes a later quartz vein or cavity lining; its exact geological age cannot be determined from the image.

Uses & applications

Used for cabochons, carvings, worry stones, polished slabs, ornaments, and collector specimens; it has little structural or industrial value.

Geological facts

Jasper is a variety of chalcedony, itself microcrystalline quartz, and red coloration commonly comes from hematite or other iron oxides. Sparkling druzy surfaces indicate tiny quartz crystals grown in an open cavity.

Field identification & locations

Identify it by its opaque red color, fine texture, hardness, and quartz sparkle; a steel file should not easily scratch the quartz-rich areas. Common sources include India, Madagascar, Brazil, the western United States, and Mexico.