metamorphic
Tumbled kiwi jasper (often sold as sesame jasper)
Trade name for a green, quartz-rich rock, commonly a mixture of quartz/chalcedony and dark mineral inclusions; not a single defined mineral species
AI-generated identification · may be incorrectOpaque, pale sage-green with scattered dark flecks and a polished surface. Quartz-rich material is typically about 6.5–7 on the Mohs scale, with a waxy to vitreous luster; exact composition and density vary.
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Physical properties
Opaque, pale sage-green with scattered dark flecks and a polished surface. Quartz-rich material is typically about 6.5–7 on the Mohs scale, with a waxy to vitreous luster; exact composition and density vary.
Formation & geological history
The trade-name material is generally silica-rich rock formed through geological alteration and silicification; a precise age or formation setting cannot be determined from appearance alone.
Uses & applications
Used mainly for tumbled-stone collecting, beads, and cabochons; not generally used as a major construction or industrial stone.
Geological facts
“Kiwi jasper” is a commercial lapidary name, not a formal jasper variety, and similar-looking green stones may be sold under overlapping names.
Field identification & locations
The rounded shape and glossy finish indicate tumbling. Green groundmass with irregular dark specks is typical of material sold as kiwi jasper; definitive identification requires testing or provenance.
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