"Mineral Classics" - Dealing in fine minerals and gems for over 35 years ! Online for nearly 10 years !

Welcome to "Mineral Classics" - - - We. hope that you enjoy viewing the specimens we are offering for sale. Remember, "Mineral Classics" pays for shipping on Priority Mail orders in the U. S. Look for our upcoming web updates this summer featuring minerals from Colorado, Bolivia, China, Pakistan, Mali, Vietnam, India and many more! Also, check out our new gem and jewlery web pages which we are currently expanding.





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Opal Gems





Gemstone # OpalEth273
Name: Opal
Locality: Ethiopia
Weight: 2.73 cts
Size: 12.77 x 9.16 mm
Price Per Carat: $80
Price For Stone:
$218.40

Cut: Modified Pear
Color: Orange w/ "Contra Luz" Color Flash
Clarity: Eye Clean
Cut By Us: Yes (Robert Heath)
Comments: Recently, some very fine Fire Opal gems have been coming out of Ethiopia. This stone has a strong "Contra Luz" effect which is a vibrant multi-color flash that appears like "rainbows" within the gem when it is backlit. The term "Contra Luz" translates to "against the light" in Spanish, and only a very small percentage of Opals show this effect. The quantity of these Ethiopian stones certainly seems to be limited, and fine quality gems are few and far between.
Availability:
Available

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Gemstone # OpalEth072
Name: Opal
Locality: Ethiopia
Weight: 0.72 cts
Size: 6.09 mm
Price Per Carat: $80
Price For Stone:
$57.60

Cut: Cut Corner Square
Color: Yellow-Orange with "Contra Luz" Color Flash
Clarity: Eye Clean
Cut By Us: Yes (Robert Heath)
Comments: Recently, some very fine Fire Opal gems have been coming out of Ethiopia. This stone has a strong "Contra Luz" effect which is a vibrant multi-color flash that appears like "rainbows" within the gem when it is backlit. The term "Contra Luz" translates to "against the light" in Spanish, and only a very small percentage of Opals show this effect. The quantity of these Ethiopian stones certainly seems to be limited, and fine quality gems are few and far between.
Availability:
Available

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Gemstone # OpalEth018
Name: Opal
Locality: Ethiopia
Weight: 0.18 cts
Size: 3.82 mm
Price Per Carat: $50
Price For Stone:
$9.00

Cut: Cut Corner Square
Color: Orange w "Contra Luz" Color Flash
Clarity: Eye Clean
Cut By Us: Yes (Robert Heath)
Comments: Recently, some very fine Fire Opal gems have been coming out of Ethiopia. This stone has a strong "Contra Luz" effect which is a vibrant multi-color flash that appears like "rainbows" within the gem when it is backlit. The term "Contra Luz" translates to "against the light" in Spanish, and only a very small percentage of Opals show this effect. The quantity of these Ethiopian stones certainly seems to be limited, and fine quality gems are few and far between.
Availability:
Available

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Gemstone # OpalEth154
Name: Opal
Locality: Ethiopia
Weight: 1.54 cts
Size: 9.10 mm
Price Per Carat: $60
Price For Stone:
$92.40

Cut: Window Pane Square
Color: Orange
Clarity: VVS
Cut By Us: Yes (Robert Heath)
Comments: This stone has a very interesting cut that shows off a "whispy" internal color flash. If you are a collector of strange, unusual and bizzarre gems, this one is certainly for you. I have never seen an Opal from any locality facetted in this manner. A very eye-catching novelty stone to be certain.
Availability:
Available

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Gemstone # OpalEth088
Name: Opal
Locality: Ethiopia
Weight: 0.88 cts
Size: 10.54 x 7.70 mm
Price Per Carat: $80
Price For Stone:
$70.40

Cut: Kite
Color: Sunburst Yellow with a blue "flash"
Clarity: Eye Clean
Cut By Us: Yes (Robert Heath)
Comments: Recently, some very fine Fire Opal gems have been coming out of Ethiopia. This stone has a strong "Contra Luz" effect which is a vibrant multi-color flash that appears like "rainbows" within the gem when it is backlit. The term "Contra Luz" translates to "against the light" in Spanish, and only a very small percentage of Opals show this effect. The quantity of these Ethiopian stones certainly seems to be limited, and fine quality gems are few and far between.
Availability:
Available

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Gemstone # OpalOreg172
Name: Opal
Locality: Owyhee River, Oregon
Weight: 1.72 cts
Size: 9.52 x 9.24 mm
Price Per Carat: $25
Price For Stone:
$43.00

Cut: Modified Trillion
Color: Orange
Clarity: Eye Clean
Cut By Us: Yes (Robert Heath)
Comments: Oregon Opals from around the Owyhee River are some of the brightest and attractive stones from the USA.   This gem has a lovely orange color with excellent custom cutting and super clarity for the material.
Availability:
Available

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Gemstone # OpalMex246
Name: Opal
Locality: Mexico
Weight: 2.46 cts
Size: 9.50 x 6.05 mm
Price Per Carat: $150
Price For Stone:
$369.00

Cut: Oval Cabochon
Color: Pale Orange-Yellow
Clarity: VVS
Cut By Us: No
Comments: A beautiful, translucent, high dome cabochon that displays tons of color flash from many directions.
Availability:
Available

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Gemstone # OpalMex150
Name: Fire Opal
Locality: Mexico
Weight: 1.50 cts
Size: 10.49 x 8.75 mm
Price Per Carat: $75
Price For Stone:
$112.50

Cut: Free Form Shield
Color: Deep Red
Clarity: VVS
Cut By Us: No
Comments: The vast majority of Mexican Fire Opals are either yellow or orange in hue, and true red gems are certainly uncommon on the market. This stone has one of the most impressive and hard to find colors for the material. Deep red Mexican Fire Opals are coveted by collectors and dealers alike.
Availability:
Available

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Gemstone # OpalMex797
Name: Fire Opal
Locality: Mexico
Weight: 7.97 cts
Size: 17.55 x 15.23 mm
Price Per Carat: $75
Price For Stone:
$597.75

Cut: Free Form
Color: Orange with "Contra Luz" Color Flash
Clarity: Eye Clean
Cut By Us: No
Comments: A very good sized and colorful Mexican Fire Opal showing the highly sought after "Contra Luz" effect. The stone displays a beautiful rainbow-like pattern of internal color when the stone is backlit. Gems of this size and quality and not common out of Mexico anymore.
Availability:
Available

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Gemstone # OpalMex775
Name: Fire Opal
Locality: Mexico
Weight: 7.75 cts
Size: 16.62 x 13.23 mm
Price Per Carat: $75
Price For Stone:
$581.25

Cut: Oval
Color: Orange
Clarity: Eye Clean
Cut By Us: No
Comments: This large Fire Opal has an excellent bright orange color with great luster and flash. This is top quality for Mexican material, and certainly looks better in person than the photos would indicate.
Availability:
Available

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Gemstone # OpalMex067
Name: Fire Opal
Locality: Mexico
Weight: 0.67 cts
Size: 9.67 x 6.51 mm
Price Per Carat: $100
Price For Stone:
$67.00

Cut: Free Form
Color: Bi-Color Orange
Clarity: Eye Clean
Cut By Us: No
Comments: For a smaller stone, this beautiful little free form (almost kidney-shaped) gem packs a lot of color The two-toned orange hue mixed wit the bright flashes of red, green and gold make it a great buy for the size and quality.
Availalbility:
Available

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Gemstone # OpalMex108
Name: Opal
Locality: Mexico
Weight: 1.08 cts
Size: 8.50 x 6.69 mm
Price Per Carat: $150
Price For Stone:
$162.00

Cut: Oval Cabochon
Color: Colorless w "Contra Luz" Color Flash
Clarity: Eye Clean
Cut By Us: No
Comments: This gem has some of the best color flash that I have seen from a 1 carat Mexican Opal. The essentially colorless background hosts a FULL spectrum of color when backlit. Gems like this are special and without out a doubt difficult to obtain these days. Less than 1% of all the Opals in northern Mexico are this quality
Availability:
Available

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Gemstone # OpalSlov179
Name: Opal
Locality: Dubnic, Slovakia
Weight: 1.79 cts
Size: 11.92 x 9.23 mm
Price Per Carat: $40
Price For Stone:
$71.60

Cut: Diamond
Color: Colorless w/ Golden Flash
Clarity: Eye Clean
Cut By Us: Yes (Robert Heath)
Comments: A custom cut, classic gemstone. from this historic locality. The rough for these stones came from an old collection and was purchased directly in Slovakia a few years ago. It is certainly one of the best quality gems from this locality that I have seen in a long time. Dubnic, Slovakia is one of the oldest and most well known Opal localities in the world. Stones like this are very and far between on the market, and highly sought after by collectors of Opal.
Availability:
Available

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Gemstone # OpalSlov234
Name: Opal
Locality: Slovakia
Weight: 2.34 cts
Size: 10.18 x 8.35 mm
Price Per Carat: $40
Price For Stone:
$93.60

Cut: Modified Pear
Color: Colorless
Clarity: Eye Clean
Cut By Us: Yes (Robert Heath)
Comments: A custom cut, classic gemstone. from this historic locality. The rough for these stones came from an old collection and was purchased directly in Slovakia a few years ago. It is certainly one of the best quality gems from this locality that I have seen in a long time. Dubnic, Slovakia is one of the oldest and most well known Opal localities in the world. Stones like this are very and far between on the market, and highly sought after by collectors of Opal.
Availability:
Available

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Gemstone # OpalSlov147
Name: Opal
Locality: Dubnic, Slovakia
Weight: 1.47 cts
Size: 10.65 x 4.86 mm
Price Per Carat: $40
Price For Stone:
$58.80

Cut: Paralelagram
Color: Colorless w/ Golden Flash
Clarity: Eye Clean
Cut By Us: Yes (Robert Heath)
Comments: A custom cut, classic gemstone. from this historic locality. The rough for these stones came from an old collection and was purchased directly in Slovakia a few years ago. It is certainly one of the best quality gems from this locality that I have seen in a long time. Dubnic, Slovakia is one of the oldest and most well known Opal localities in the world. Stones like this are very and far between on the market, and highly sought after by collectors of Opal.
Availability:
Available

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Gemstone # OpalSlov227
Name: Opal
Locality: Slovakia
Weight: 2.27 cts
Size: 10.06 x 7.10 mm
Price Per Carat: $40
Price For Stone:
$90.80

Cut: Emerald
Color: Colorless w/ Golden Flash
Clarity: Eye Clean
Cut By Us: Yes (Robert Heath)
Comments: A custom cut, classic gemstone. from this historic locality. The rough for these stones came from an old collection and was purchased directly in Slovakia a few years ago. It is certainly one of the best quality gems from this locality that I have seen in a long time. Dubnic, Slovakia is one of the oldest and most well known Opal localities in the world. Stones like this are very and far between on the market, and highly sought after by collectors of Opal.
Availability:
Available

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