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Yita ridge, Mezezo, Amhara Region, Ethiopiai
Regional Level Types
Yita ridgeRidge
Mezezo- not defined -
Amhara RegionRegion
EthiopiaCountry

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Latitude & Longitude:
11° North , 38° East (est.)
Estimate based on other nearby localities or region boundaries.
Margin of Error:
~356km
Locality type:


Opal nodules mined from rhyolitic rock.
Formerly in Showa region.

Opals from here, called chocolate opal because of the chocolate colour inside the nodules, came on the market in the early 1990s.

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List


1 valid mineral.

Detailed Mineral List:

Opal
Formula: SiO2 · nH2O
Reference: Gem Information, 23 May 2007 (Japan Germany Gemmological Laboratory), 20-24.

List of minerals arranged by Strunz 10th Edition classification

Group 4 - Oxides and Hydroxides
Opal4.DA.10SiO2 · nH2O

List of minerals arranged by Dana 8th Edition classification

Group 75 - TECTOSILICATES Si Tetrahedral Frameworks
Si Tetrahedral Frameworks - SiO2 with H2O and organics
Opal75.2.1.1SiO2 · nH2O

List of minerals for each chemical element

HHydrogen
H OpalSiO2 · nH2O
OOxygen
O OpalSiO2 · nH2O
SiSilicon
Si OpalSiO2 · nH2O

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