metamorphic
Green Spot Jasper (Kiwi Jasper / Sesame Jasper)
Partially altered granitic rock rich in quartz, microcline feldspar, and tourmaline or amphibole inclusions
Hardness: 6.0-7.0 on Mohs scale. Color: Pale mint green to seafoam green with black or dark speckles/flecks. Luster: Vitreous to waxy when polished. Structure: Microcrystalline matrix containing dark mineral inclusions.
- Hardness
- 6
- Luster
- Vitreous to waxy when polished
Identified More metamorphic →
Explore Green Spot Jasper (Kiwi Jasper / Sesame Jasper) in the encyclopedia →Identify your own rocks.
Get a report just like this from any photo, free.
Physical properties
Hardness: 6.0-7.0 on Mohs scale. Color: Pale mint green to seafoam green with black or dark speckles/flecks. Luster: Vitreous to waxy when polished. Structure: Microcrystalline matrix containing dark mineral inclusions.
Formation & geological history
Formed through the metamorphic and hydrothermal alteration of granitic or pegmatitic rocks, where tourmaline or amphibole inclusions became trapped within a quartz and feldspar matrix.
Uses & applications
Used primarily for carved decorative items (such as spheres, mushrooms, and figurines), lapidary art, polished palm stones, and fashion jewelry.
Geological facts
Despite often being called 'Kiwi Jasper' or 'Sesame Jasper', this material is geologically a form of microcrystalline quartz mixed with feldspar and dark inclusions rather than a true jasper.
Field identification & locations
Identified by its distinctive soft mint-green background speckled with black spots, resembling a kiwi fruit. Commonly sourced from New Zealand and Madagascar. Popular among crystal collectors for its unique aesthetic and polished carvings.
More like this
