gemstone
Tumbled Agate
Silicon Dioxide (Chalcedony variety), SiO2
AI-generated identification · may be incorrectHardness: 6.5 to 7 on the Mohs scale; Color: Tan, beige, brown, and translucent white banding; Luster: Waxy to vitreous; Crystal Structure: Trigonal (microcrystalline quartz); Cleavage: None (conchoidal fracture); Specific Gravity: 2.58 to 2.64
- Hardness
- 6
- Color
- Tan, beige, brown, and translucent white banding
- Luster
- Waxy to vitreous
Identified More gemstone →
Explore Tumbled Agate in the encyclopedia →Identify your own rocks.
Get a report just like this from any photo, free.
Physical properties
Hardness: 6.5 to 7 on the Mohs scale; Color: Tan, beige, brown, and translucent white banding; Luster: Waxy to vitreous; Crystal Structure: Trigonal (microcrystalline quartz); Cleavage: None (conchoidal fracture); Specific Gravity: 2.58 to 2.64
Formation & geological history
Formed by the deposition of silica from groundwater in the cavities of igneous and sedimentary rocks, typically occurring over millions of years.
Uses & applications
Used primarily in lapidary arts, tumbled stones, decorative ornaments, jewelry, and gemstone collecting.
Geological facts
Agate has been used since antiquity for ornaments, seals, and healing talismans, with famous archaeological discoveries in ancient Crete and Egypt.
Field identification & locations
Identified by its microcrystalline structure, waxy luster, and concentric banding patterns; commonly found worldwide in volcanic rock cavities and river gravels.
More like this
Other gemstone specimens
Gemstone Ring
N/A - Set piece of jewelry, likely Amethyst or Garnet with Diamond or CZ
gemstone
Ammolite
Ammolite (Biogenic Aragonite with trace elements; fossils of Placenticeras meeki and Placenticeras intercalare)
mineral
Topaz
Al2SiO4(F,OH)2
mineral
Amber
Succinite (Organic Gemstone)
mineral
Diamond and Gold Jewelry
Carbon (Diamond) / Au (Gold)
gemstone
Red Jasper
Silicon Dioxide (SiO2) with Hematite inclusions
sedimentary