mineral

Banded Agate (Pink/White)

Silicon Dioxide (SiO2) - Variety of Chalcedony

Hardness: 6.5-7 (Mohs scale), Color: White with concentric pink bands, Luster: Waxy to vitreous, Crystal Structure: Trigonal/Microcrystalline, Cleavage: None, Specific Gravity: 2.58-2.64

Hardness: 6

Identified May 9, 2026More mineral →

Identify your own rocks.

Get a report just like this from any photo, free.

App Store Google Play

Physical properties

Hardness: 6.5-7 (Mohs scale), Color: White with concentric pink bands, Luster: Waxy to vitreous, Crystal Structure: Trigonal/Microcrystalline, Cleavage: None, Specific Gravity: 2.58-2.64

Formation & geological history

Forms primarily in cavities of volcanic rocks (lavas) where silica-rich groundwater deposits layers of chalcedony over thousands of years. Often found in geodes or as nodules.

Uses & applications

Commonly used in jewelry for cabochons and beads, ornamental carvings, talismans, and as collected tumbled stones for metaphysical purposes.

Geological facts

The name comes from the Achates River in Sicily. The pink hue in this specimen is often due to iron or manganese inclusions, but can also be enhanced through heat treatment or dyeing in commercial trade.

Field identification & locations

Look for distinct concentric or parallel banding and a waxy surface texture. This specimen shows 'eye' formations. It is commonly found in Brazil, India, and the Lake Superior region of the USA.

Other mineral specimens

See all

Sandstone (with potential mineral staining/concretions)

Arenite (SiO2 based)

sedimentary

Epidote

Epidote | Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH)

metamorphic

Nephrite Jade

Nephrite

Mineral/Rock

Banded Gneiss (River Rock/Pebble)

Gneiss (specifically a banded variety often found as a river rock)

Metamorphic Rock

Green Apatite on Albite

Fluorapatite [Ca5(PO4)3F] on Albite [Na(AlSi3O8)]

mineral

Epidote

Epidote - Ca2(Al2,Fe3+)3(SiO4)3(OH)

mineral