mineral

Tumbled sunstone (likely feldspar)

Feldspar, probably oligoclase or labradorite; exact variety cannot be confirmed visually

AI-generated identification · may be incorrect

Rounded, polished orange-red and cream stone with a glassy to subdued luster. Feldspar hardness is about 6–6.5 Mohs; crystals are triclinic or monoclinic, with two cleavage directions. The image does not clearly show diagnostic aventurescence.

Identified October 16, 2026More mineral →

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Physical properties

Formation & geological history

Sunstone forms in feldspar-rich igneous rocks as magma cools; the specimen has been shaped and polished by tumbling. Its geological age and source cannot be determined from the image.

Uses & applications

Used in cabochon jewelry, beads, and ornamental collections; feldspar is also an important industrial mineral in ceramics and glass.

Geological facts

Some sunstone contains tiny copper or hematite inclusions that create glittering aventurescence when viewed at an angle.

Field identification & locations

The warm color and possible internal sparkle suggest sunstone, but similar-looking feldspar and other stones are common. Confirm with a hardness test and inspection for directional metallic glitter; sunstone occurs notably in Oregon, India, and Norway.