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

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Key
Latitude & Longitude (WGS84):
9° 59' North , 39° 45' East
Latitude & Longitude (decimal):
Nearest Settlements:
PlacePopulationDistance
Debre Sīna9,409 (2013)15.1km
Abomsa15,258 (2012)25.5km
Debre Birhan57,787 (2013)41.3km


A small town at 2476 metres elevation, centre of an opal mining district.

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 Gallery Strunz Dana Chemical Elements

Mineral List

Mineral list contains entries from the region specified including sub-localities

1 valid mineral.

Detailed Mineral List:

Opal
Formula: SiO2 · nH2O
Reference: Gem Information, 23 May 2007 (Japan Germany Gemmological Laboratory), 20-24.
Opal var:
Reference: GIA 2019

List of minerals arranged by Strunz 10th Edition classification

Group 4 - Oxides and Hydroxides
Opal4.DA.10SiO2 · nH2O
var: White 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
Unclassified Minerals, Mixtures, etc.
var: White Opal-SiO2 · nH2O

List of minerals for each chemical element

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

References

Sort by

Year (asc) Year (desc) Author (A-Z) Author (Z-A)
F. Mazzero (2003), A la découverte des gisements d’opale du Shewa, relation de voyage en Ethiopie, Revue de gemmologie AFG n°148
J.P. Gauthier, F. Mazzero, Y. Mandaba, E. Fritsch : gemmologie ordinaire et caractéristiques exceptionnelles ( 2004), Revue de gemmologie AFG n°149
Yannick Mandaba (2003), Particularité des opales d’Ethiopie, DUG Nantes (website gemme.la.rca.free.fr)

External Links


Localities in this Region

Other Regions, Features and Areas containing this locality

Africa
African PlateTectonic Plate

This page contains all mineral locality references listed on mindat.org. This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to visit any sites listed in mindat.org without first ensuring that you have the permission of the land and/or mineral rights holders for access and that you are aware of all safety precautions necessary.
 
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