PARCEL OF ZEBRA ROCK GEMSTONES 200 GRAMS AAT245
About This Auction |
About This Seller: AAAgems |
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| Minimum Bid (USD) | Feedback Rating | 99.45% Positive | |
| Current Bid (USD) | 0.00 | Member Since | 23 Jun 2007 in Australia |
| Bid Increment (USD) | 1.00 |
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| Bids Placed | 0 | ||
| Starting Bid (USD) | 25.00 | ||
| Reserve Price (USD) | none | ||
| Starts | November 20, 2009 6:05 PM | ||
| Ends | November 23, 2009 6:00 PM | Basic Shipping Information | |
| Auction Category | Zebra Rock | Shipping Cost | 3.00 paid by buyer |
| Auction ID | 138402 | Shipping Insurance (optional) | 7.00 |
Ends in 1 day 7 hours |
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Gallery
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Description
DESCRIPTION ZEBRA ROCK SLABBED SORTED AND TUMBLED POLISHED
600 MILLION YEARS OF HISTORY
SOURCE WESTERN AUSTRALIA
UP NORTH IN THE KIMBERLEY AREA OF HOT DRY DUSTY DESERT.
SIZE LARGEST SIZE 64 X21 X 18 MM
WEIGHT APPROX 200 GRAMS OR 1,000 CARATS
PARCEL PIECES AS PER PHOTO
This distinctive reddish-brown and white banded
ornamental stone from the East Kimberley, Western
Australia, has been known as zebra rock since its
discovery in 1924. Some of the original localities,
including one about 4.8km southwest of the former
Argyle Downs Station, are now submerged beneath
the dam waters of Lake Argyle, but there are others
which are still being exploited.
Zebra rock forms lenses and seams, some
extending for kilometres, within the Johnny Cake
Shale, which is of Late Precambrian age (around
670 million years old). The rock is an “argillite” or clay rock. It is largely made up of clay minerals but
also contains tiny angular fragments of quartz and mica flakes, and the mineral, hematite (an iron oxide),
which is the main iron-bearing mineral. Most of the clay is the common mineral kaolinite, which forms
during weathering of rocks (such as granite) containing feldspar and other aluminium silicates and can
be deposited as a sediment in water to eventually make a clay rock like a shale or mudstone.
More Information
Certified Gemstones: no
Weight: 200 carats
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