Rock Identifier
Dyed Agate Geode (Pink/Magenta) (Silicon Dioxide (SiO2) - variety of Chalcedony/Quartz) — mineral
mineral

Dyed Agate Geode (Pink/Magenta)

Silicon Dioxide (SiO2) - variety of Chalcedony/Quartz

Hardness: 6.5–7 (Mohs). Color: Naturally grey/white with artificial pink/magenta dye. Luster: Vitreous to waxy. Crystal structure: Trigonal (cryptocrystalline). Cleavage: None (conchoidal fracture). Specific Gravity: 2.58–2.64.

Hardness
6
Color
Naturally grey/white with artificial pink/magenta dye
Luster
Vitreous to waxy
Identified More mineral →

Identify your own rocks.

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

App StoreGoogle Play

Physical properties

Hardness: 6.5–7 (Mohs). Color: Naturally grey/white with artificial pink/magenta dye. Luster: Vitreous to waxy. Crystal structure: Trigonal (cryptocrystalline). Cleavage: None (conchoidal fracture). Specific Gravity: 2.58–2.64.

Formation & geological history

Formed as secondary deposits in hollow cavities (vesicles) of volcanic igneous rocks where silica-rich groundwater deposited layers of quartz over millions of years. This specific specimen appears to be from the Rio Grande do Sul region of Brazil.

Uses & applications

Primarily used for decorative home decor, bookends, metaphysical crystal collections, and inexpensive children's rock collections.

Geological facts

The vibrant 'hot pink' color is not natural; agate is porous, allowing it to be treated with chemicals and heat to take on bright colors. The concentric banding records the various pulses of mineral-rich water that filled the void.

Field identification & locations

Identify by the distinct concentric 'fortification' banding and the crystalline quartz center. In the field, look for rounded, potato-like nodules with a rough, weathered exterior (cortex). Note: natural pink agates are usually soft blush or peach-toned, not neon.

More like this

Other mineral specimens

Sandstone (with potential mineral staining/concretions) (Arenite (SiO2 based)) — sedimentary

Sandstone (with potential mineral staining/concretions)

Arenite (SiO2 based)

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

Epidote

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

metamorphic
Nephrite Jade (Nephrite) — Mineral/Rock

Nephrite Jade

Nephrite

Mineral/Rock
Banded Gneiss (River Rock/Pebble) (Gneiss (specifically a banded variety often found as a river rock)) — Metamorphic 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

Green Apatite on Albite

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

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

Epidote

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

mineral