mineral
Polished jasper-like stone
Likely chalcedony (microcrystalline quartz, SiO₂), possibly brecciated jasper
AI-generated identification · may be incorrectCream, tan, and brown mottling with dark vein-like inclusions; polished, waxy to dull luster. Quartz hardness is about 6.5–7 Mohs; the rounded, opaque appearance is consistent with a tumbled stone, but the photo cannot confirm the exact material.
Identified More mineral →
Explore Polished jasper-like stone in the encyclopedia →Identify your own rocks.
Get a report just like this from any photo, free.
Physical properties
Cream, tan, and brown mottling with dark vein-like inclusions; polished, waxy to dull luster. Quartz hardness is about 6.5–7 Mohs; the rounded, opaque appearance is consistent with a tumbled stone, but the photo cannot confirm the exact material.
Formation & geological history
Chalcedony forms when silica-rich fluids fill cavities or fractures and harden; iron oxides can create tan and brown colors. Its geological age and exact formation setting cannot be determined from the image.
Uses & applications
Commonly tumbled for collecting, ornaments, and small jewelry; similar material may be cut into beads or cabochons.
Geological facts
Jasper is an opaque variety of chalcedony, and its colors and patterns are caused largely by mineral impurities.
Field identification & locations
The smooth polish and irregular color bands suggest a tumbled silica-rich stone. Hardness and a close inspection of its texture can help distinguish chalcedony from other decorative stones.
More like this
Other mineral specimens
Gneiss or Schist
Gneiss or Mica Schist with Garnet
Metamorphic
Sandstone (with potential mineral staining/concretions)
Arenite (SiO2 based)
sedimentary
Epidote
Epidote | Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH)
metamorphic
Pegmatite with Tourmaline and Quartz
Igneous Pegmatite
igneous
Granite
Granite (Phaneritic intrusive igneous rock)
igneous
Septarian Pebble
Septarian nodule / Concretion
sedimentary