mineral

Tumbled yellow chalcedony (likely citrine or yellow jasper)

Microcrystalline quartz, SiO₂; possibly iron-stained chalcedony

AI-generated identification · may be incorrect

Translucent honey-yellow, waxy to vitreous luster, cryptocrystalline quartz, no visible cleavage, Mohs hardness 6.5–7, specific gravity about 2.60. The rounded shape indicates tumbling or natural abrasion; brown areas likely iron-oxide staining or inclusions.

Identified August 16, 2026More mineral →

Explore Tumbled yellow chalcedony (likely citrine or yellow jasper) in the encyclopedia →

Identify your own rocks.

Get a report just like this from any photo, free.

App Store Google Play

Physical properties

Formation & geological history

Chalcedony forms when silica-rich groundwater fills cavities and fractures, commonly in volcanic rocks; iron produces yellow-brown coloration. Exact geological age cannot be determined from the photograph.

Uses & applications

Used as an inexpensive lapidary stone for cabochons, beads, carvings, and decorative pieces; generally not valuable as a faceted gemstone unless unusually clear and naturally colored.

Geological facts

Yellow chalcedony is often marketed as yellow jasper, honey quartz, or citrine, though true citrine is crystalline quartz rather than cryptocrystalline chalcedony.

Field identification & locations

Common sources include Brazil, Uruguay, India, Madagascar, Mexico, and the western United States. Identification requires a hardness test, translucency inspection, and ideally refractive-index or microscopic testing; glass and dyed agate are common look-alikes.