Black Chalcedony tumbled

A variety of Black Agate

What is Black Chalcedony tumbled?

Black Chalcedony tumbled is a translucent or opaque gemstone whose color range from dark gray to black. Like all chalcedony types, it is mined in numerous localities, but pure black Chalcedony tumbled is rarely found. It is often sold in the form of beads and tumbled stones.

Optical Properties

Refractive Index
1.530-1.543
Birefringence
0.003-0.009
Pleochroism
None
Optical Character
Biaxial positive
Dispersion
0.013

Black Chalcedony tumbled Market Value Calculator

Estimate the market value of Black Chalcedony tumbled using size, quality, and finish. This preview calculator is for quick context and is not a formal appraisal.

Preview only. Full pricing comps and valuation report in the app.

Black Chalcedony tumbled Localities Map

See where Black Chalcedony tumbled is found with a localities map, collecting zones, and geology context. Generate a sample map preview below.

Map preview
North ZoneCentral RidgeSouth Basin

Interactive map layers and collecting notes are available in the app.

Quick Facts

Physical Properties

Streak
White

Chemical Properties

Chemical Formula
SiO2
Elements
O, Si
FREE APP
4.7
Ruby Glint rock identifier app

Identify Black Chalcedony tumbled Instantly

  • Snap a photo, get instant results
  • 6,700+ rocks, minerals & crystals
  • Discover collecting spots near you
Download for iOSDownload for Android

Explore More Rocks & Minerals

All Rocks & Minerals|Minerals|Igneous Rocks|Sedimentary Rocks|Metamorphic Rocks|Rock Identifier Tool