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Aztec prehispanic stone cabs


Obsidian is a type of natural occurring glass formation produced when lava flows from a volcano and cools rapidly without sufficient time for crystal growth to start. Obsidian is commonly found within rhyolitic lava flows known as obsidian flows. Not a true mineral because as a glass it is not crystalline; its composition is too complex to comprise just a single mineral.

Because obsidian is metastable at the earth's surface, no obsidian has been found that is older than Cretaceous age, this breakdown of obsidian is accelerated by the presence of water. Pure obsidian is usually dark in appearance, though the color varies depending on the presence of impurities. Iron and magnesium give the obsidian a dark green, brown or black color. In some stones, the inclusion of small, white clustered crystals of cristobalite in the black glass produce a snowflake pattern (snowflake obsidian). They may also contain patterns of gas bubbles that remained from the lava flow, these bubbles can produce interesting multicolor effects such as rainbow or velvet obsidian or a silver or rarer golden sheen effect.

obsidian obsidiana              


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BULLSEYE
RAINBOW CAB

Origin: Chihuahua, México
Cabochon Size:

39mm x 46mm x 11mm
Weight:
24.0 grams

Price: $24.00         OB503





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RAINBOW
OBSIDIAN

Origin: Chihuahua, México
Cabochon Size:

43mm x 22mm x 10mm
Weight:
10.1 grams

Price: $12.00         OB551





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VELVET OBSIDIAN
CABOCHON

Origin: Chihuahua, México
Cabochon Size:

48mm x 25mm x 7mm
Weight:
11.1 grams

Price: $24.00         OB394





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PURPLE RAINBOW
OBSIDIAN

Origin: Chihuahua, México
Cabochon Size:

36mm x 21mm x 7mm
Weight:
5.4 grams

Price: $28.00         OB569





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PEARL RAINBOW
OBSIDIAN

Origin: Chihuahua, México
Cabochon Size:

35mm x 20mm x 9mm
Weight:
7.4 grams

Price: $14.00         OB585





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MAHOGANY HAZE
OBSIDIAN

Origin: Utah, USA
Cabochon Size:

35mm x 20mm x 8mm
Weight:
7.4 grams

Price: $12.00      OB449





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RAINBOW
FREEFORM CAB

Origin: Chihuahua, México
Cabochon Size:

38mm x 17mm x 6mm
Weight:
5.2 grams

Price:$12.00         OB533





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GOLD SHEEN
OBSIDIAN

Origin: Chihuahua, México
Cabochon Size:

36mm x 25.5mm x 9mm
Weight:
11.8 grams

Price: $20.00         OB528





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MAHOGANY
HAZY OBSIDIAN

Origin: Utah, USA
Cabochon Size:

34mm x 24mm x 8.5mm
Weight:
9.2 grams
(semi-transparent)

Price: $10.00      OB535





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MAHOGANY HAZE
TEARDROP CAB

Origin: Utah, USA
Cabochon Size:

39mm x 23mm x 6.5mm
Weight:
7.1 grams
(semi-transparent)

Price: $15.00          OB536





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LARGE RAINBOW
OBSIDIAN

Origin: Chihuahua, México
Cabochon Size:

40mm x 39mm x 9mm
Weight:
14.8 grams

Price: $18.00         OB581





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PURPLE RAINBOW
OBSIDIAN CAB

Origin: Chihuahua, México
Cabochon Size:

38mm x 17mm x 8mm
Weight:
6.2 grams

Price: $25.00         OB570





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BLUE VELVET
OBSIDIAN

Origin: Chihuahua, México
Cabochon Size:

27mm x 18mm x 9mm
Weight:
5.4 grams

Price: $24.00         OB541




   

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Please Note: In some of the obsidian cabochon photos there are reflections and white specks (dust). These cabs are mirror polished and anything within a 360° radius is reflected like a mirror and every minute speck of dust flowing through the air is attracted like a magnet - these stones are gem quality specimens and have no flaws, you can also view our Testimonals .

Obsidian can be found in many locations around the world which have experienced rhyolitic volcanic eruptions. Among these places, large obsidan flows are found within the calderas of volcano craters.

Obsidian was a highly valued stone in Stone Age and Prehispanic cultures because, like flint, it could be fractured to produce sharp blades and arrowheads. Like all glass and some other types of naturally occurring rocks, obsidian breaks with a characteristic conchoidal fracture. It was also highly polished to create early mirrors, which you will notice with our cabochon photos, they reflect everything around - like a mirror.

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