gemstone
Agate
Silicon Dioxide (Chalcedony variety, $SiO_2$)
AI-generated identification · may be incorrectHardness: 6.5-7 on the Mohs scale. Color: White, gray, translucent with banded patterns. Luster: Waxy to vitreous. Crystal structure: Trigonal (microcrystalline quartz). Cleavage: None. Specific gravity: 2.60-2.65.
- Hardness
- 6
- Color
- White, gray, translucent with banded patterns
- Luster
- Waxy to vitreous
Identified More gemstone →
Explore Agate in the encyclopedia →Identify your own rocks.
Get a report just like this from any photo, free.
Physical properties
Hardness: 6.5-7 on the Mohs scale. Color: White, gray, translucent with banded patterns. Luster: Waxy to vitreous. Crystal structure: Trigonal (microcrystalline quartz). Cleavage: None. Specific gravity: 2.60-2.65.
Formation & geological history
Formed primarily within cavities of volcanic and metamorphic rocks through the deposition of silica-rich groundwater solutions in concentric layers over millions of years.
Uses & applications
Used for ornamental carvings, jewelry, metaphysical purposes, and as a decorative collector's item.
Geological facts
Agate is one of the most popular and versatile stones for lapidary work due to its durability and striking natural banding.
Field identification & locations
Easily identified by its characteristic curved or concentric banding and waxy luster. Found worldwide, notably in Brazil, India, Madagascar, and the United States.
More like this
Other gemstone specimens
Ammolite
Ammolite (Biogenic Aragonite with trace elements; fossils of Placenticeras meeki and Placenticeras intercalare)
mineral
Gemstone Ring
N/A - Set piece of jewelry, likely Amethyst or Garnet with Diamond or CZ
gemstone
Amber
Succinite (Organic Gemstone)
mineral
Diamond and Gold Jewelry
Carbon (Diamond) / Au (Gold)
gemstone
Red Jasper
Silicon Dioxide (SiO2) with Hematite inclusions
sedimentary
Cubic Zirconia (simulant) or Diamond
ZrO2 (Cubic Zirconia) or C (Diamond)
gemstone