mineral
Tumbled blue chalcedony, possibly dyed agate
Microcrystalline quartz, SiO₂ (chalcedony)
AI-generated identification · may be incorrectPale blue, polished, translucent to opaque with a waxy-to-glassy luster; quartz crystal structure is too fine-grained to see. Hardness is about 6.5–7 Mohs; the image is too blurry to confirm banding or dye.
Identified More mineral →
Explore Tumbled blue chalcedony, possibly dyed agate in the encyclopedia →Identify your own rocks.
Get a report just like this from any photo, free.
Physical properties
Pale blue, polished, translucent to opaque with a waxy-to-glassy luster; quartz crystal structure is too fine-grained to see. Hardness is about 6.5–7 Mohs; the image is too blurry to confirm banding or dye.
Formation & geological history
Silica-rich groundwater deposits chalcedony in cavities and fractures, often in volcanic rocks; formation may span many geological ages. Tumbling and possible coloring are human processing.
Uses & applications
Used for inexpensive jewelry, ornaments, and lapidary pieces; value depends on material quality and treatment.
Geological facts
Blue chalcedony is commonly colored naturally by trace elements, but vivid or unusually uniform color can indicate dye.
Field identification & locations
Look for a smooth, waxy surface and translucence at thin edges; agate varieties often show bands. Common sources include Brazil, Uruguay, India, and the United States.
More like this
Other mineral specimens
Gneiss or Schist
Gneiss or Mica Schist with Garnet
Metamorphic
Sandstone (with potential mineral staining/concretions)
Arenite (SiO2 based)
sedimentary
Tumbled granite
Granite, a coarse-grained felsic intrusive igneous rock
igneous
Epidote
Epidote | Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH)
metamorphic
Pegmatite with Tourmaline and Quartz
Igneous Pegmatite
igneous
Granite
Granite (Phaneritic intrusive igneous rock)
igneous