Indian Agate Identification Guide
A field guide to Indian agate, the banded chalcedony from India, covering its colors, banding, hardness test, and look-alikes.
Read the full Indian Agate encyclopedia entry →
What Indian Agate Looks Like
Indian agate is banded chalcedony (microcrystalline quartz) from India, a broad trade category covering many earthy colors and patterns:
- Color: green, brown, tan, gray, cream, rust-red, sometimes with moss or dendritic inclusions
- Luster: waxy to dull raw; glassy when polished
- Transparency: translucent to opaque
- Pattern: concentric banding, fortification (zig-zag) bands, eyes, and clouded or mossy zones
Step-by-Step Field ID Checklist
- Look for banding or translucency. Curved concentric bands or translucent edges suggest agate.
- Backlight it. Hold to a light — chalcedony often glows translucent at thin edges.
- Test hardness. Mohs 6.5–7; it scratches glass and resists a steel knife.
- Check fracture. Conchoidal, smooth; no cleavage.
- Feel the polish and waxy luster, typical of chalcedony.
Key Diagnostic Tests
- Hardness: 6.5–7 — scratches glass; key separator from dyed soft imitations.
- Streak: white.
- Fracture: conchoidal; no cleavage.
- Density: ~2.6 g/cm3.
- No acid reaction.
- Translucency: banded translucent zones distinguish agate from fully opaque jasper.
Common Look-Alikes
- Jasper: opaque silica with no translucency or banding; agate is at least partly translucent and banded.
- Dyed agate: Indian agate is often dyed in bright unnatural colors; look for color concentrated along bands/cracks and overly vivid blues/pinks. Natural Indian agate is earthy-toned.
- Moss agate: a translucent agate with green dendritic inclusions but no concentric banding; sometimes sold under the Indian agate label.
- Carnelian/chalcedony: same mineral family, differ by color and banding.
- Glass: can mimic dyed agate but lacks banding and often has bubbles.
Where It Is Found
Indian agate comes mainly from the Deccan Traps basalts of western India (Gujarat and Maharashtra, around the Khambhat/Ratnapur region), where agate fills gas cavities (amygdules) in the lava and is recovered from weathered basalt and river gravels.
Frequently asked questions
How can you tell if it's real Indian agate?
Real Indian agate is a hard (6.5–7) banded chalcedony that scratches glass, shows translucent edges when backlit, has a waxy-to-glassy luster, and does not fizz in acid. Earthy natural colors and curved banding are typical; overly bright uniform color suggests dye.
What does Indian agate look like?
It looks like a banded, partly translucent stone in earthy greens, browns, tans, and grays, sometimes with concentric rings, eyes, or mossy inclusions, taking a glassy polish.
Is Indian agate dyed?
Much commercial Indian agate is dyed into vivid blues, pinks, and greens. Natural Indian agate has muted earthy tones, so unnaturally bright or evenly saturated color, especially pooling along cracks, points to dyeing.
What is the difference between Indian agate and jasper?
Indian agate is banded and at least partly translucent (light passes through thin edges), while jasper is fully opaque and unbanded. Both are silica with hardness near 7.
Indian Agate identified by the community
Recent Indian Agate specimens identified with Rock Identifier.
