Matrix Opal

Big Photo

Mexico
11.90 carats
© Palagems

Masses of tiny cracks filled with Precious Opal in dark brown ironstone (matrix).

Matrix Opal Gemstones by Colour

This table shows the variety of hues this gemstone can be found in. Click on a photo for more information.
 

Matrix Opal Gemstones by Size

This table shows distribution of Matrix Opal gemstone sizes that are listed on this site. This can give a good indication as to the general availability of this gemstone in different sizes.
Contributed photos
Lightest:8.69 cts
Heaviest:22.74 cts
Average:13.32 cts
Total photos:4
Do you have a larger Matrix Opal? Why not upload a photo?
8.69ct to 10.10ct10.10ct to 11.50ct11.50ct to 12.91ct12.91ct to 14.31ct14.31ct to 15.72ct15.72ct to 17.12ct17.12ct to 18.53ct18.53ct to 19.93ct19.93ct to 21.34ct21.34ct to 22.74ct
General Information
A variety or type of:Precious Opal, which is a variety of Opal
Physical Properties of Matrix Opal
Mohs Hardness5.5 to 6.5
Walter Schumann, Gemstones of the world (2001)
Specific Gravity1.98 to 2.50
Walter Schumann, Gemstones of the world (2001)
TenacityBrittle
Walter Schumann, Gemstones of the world (2001)
Cleavage QualityNone
Walter Schumann, Gemstones of the world (2001)
FractureConchoidal,Splintery
Walter Schumann, Gemstones of the world (2001)
Optical Properties of Matrix Opal
Refractive Index1.37 to 1.52
Walter Schumann, Gemstones of the world (2001)
BirefringenceNone
Walter Schumann, Gemstones of the world (2001)
PleochroismAbsent
Walter Schumann, Gemstones of the world (2001)
DispersionNone
Walter Schumann, Gemstones of the world (2001)
Colour
Colour (General)All colours, partially play-of-colour
Walter Schumann, Gemstones of the world (2001)
Crystallography of Matrix Opal
Crystal SystemAmorphous
Walter Schumann, Gemstones of the world (2001)
HabitKidney- or grape-shaped aggregates
Walter Schumann, Gemstones of the world (2001)
Geological Environment
Where found:SiO^2.nH^2O
Walter Schumann, Gemstones of the world (2001)
Further Information
Mineral information:Matrix Opal information at mindat.org
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