Pink Agate Identification Guide

What Pink Agate Looks Like

Pink agate is a banded chalcedony (microcrystalline quartz) with soft pink to rose coloration, often paired with white, grey, or cream bands.

• Color: Pale to medium pink, blush, or salmon, frequently banded with white or translucent grey.
• Luster: Waxy to vitreous.
• Transparency: Translucent (especially on thin edges) to opaque.
• Habit: Nodules, geode linings, and seam fills; banding may be concentric (fortification) or wavy.

Step-by-Step Field ID Checklist

1. Backlight a thin edge. Real agate glows translucent.
2. Look for banding. Concentric or layered pink-and-white banding strongly supports agate.
3. Feel the polish. Smooth, waxy surface.
4. Scratch test. It scratches glass; steel will not scratch it.
5. Check color distribution. Natural pink is usually soft and gradational, not neon-uniform.

Key Diagnostic Tests

• Mohs hardness: ~6.5–7.
• Streak: White.
• Fracture: Conchoidal; no cleavage.
• Density: ~2.6 g/cm³.
• Acid: No reaction — distinguishes it from pink carbonates.

Common Look-Alikes and How to Tell Them Apart

• Rose quartz: Usually massive and more uniformly pink without fine banding; often cloudy/translucent throughout rather than layered.
• Rhodochrosite/pink calcite: Much softer (3–4), fizzes or scratches easily; pink agate is hard and acid-inert.
• Pink opal: Softer (~5.5–6.5), lighter, waxy-resinous, and lacks crisp agate banding.
• Dyed agate: Many commercial pink agate slices are dyed; tells include unnatural saturation, color pooling in cracks, and dye following porous bands while skipping dense ones.
• Pink chalcedony (un-banded): If there is no banding, it is chalcedony rather than true agate.

Where Pink Agate Is Found

Agate is worldwide; pink-toned material comes from Brazil, India, Madagascar, the western United States, and Botswana, among others. Because much retail pink agate is dyed grey agate, rely on physical tests and band/color behavior rather than color alone.