ARAGONITE CRYSTAL CLUSTER 60 CTS [MX1596]
About This Auction |
About This Seller: mineralgemworld |
||
| Minimum Bid (USD) | Feedback Rating | 99.43% Positive | |
| Current Bid (USD) | 0.00 | Member Since | 1 Sep 2007 in Australia |
| Bid Increment (USD) | 1.00 |
|
|
| Bids Placed | 0 | ||
| Starting Bid (USD) | 9.99 | ||
| Reserve Price (USD) | none | ||
| Starts | November 21, 2009 11:05 PM | ||
| Ends | November 24, 2009 11:05 PM | Basic Shipping Information | |
| Auction Category | Mineral Specimens | Shipping Cost | 3.00 paid by buyer |
| Auction ID | 86386 | Shipping Insurance (optional) | 7.00 |
Ends in 2 days 19 hours |
|||
| * note for every bid placed in the last 5 minutes the auction end time increases by 60 seconds - refresh page to update | |||
Gallery
 |
 |
|
* Hint: Click on the thumbnails above to see the full sized version. Images are of the actual item unless otherwise indicated.
Description
ARAGONITE CLUSTER SPECIMEN
This is a natural specimen from Morocco showing strong cluster of crystal development.
Weight 60 cts app
Size 33 x28 x14 mm app
Aragonite occurs in two distinct places Spain and Morocco. This crystal cluster is from a pocket in a Moroccan lava bed, where it formed at high pressure and relatively low temperature. At surface conditions, aragonite is actually metastable, and heating it to 400°C will make it revert to calcite. The other point of interest about these crystals is that they are multiple twins that make these pseudo-hexagons. Single aragonite crystals are shaped more like tablets or prisms.
Aragonite is calcium carbonate with the same chemical formula as calcite, but its carbonate ions are packed differently. That is, aragonite and calcite are polymorphs of calcium carbonate. It is harder than calcite (3.5 to 4, rather than 3, on the Mohs scale) and somewhat denser, but like calcite it responds to weak acid by vigorous bubbling. You may pronounce it a-RAG-onite or AR-agonite, though the majority of American geologists use the first pronunciation. It is named for Aragon, in Spain, where notable crystals occur.
Bidding History
| No bids yet! |
About This Seller
mineralgemworld's Shipping, Handling & Return Policies
ONE ITEM
Our basic shipping /handling fee is $3.00 per item sent first class airmail.
FOUR ITEMS
We offer a combine shipping/handling of 4 items from the one site for $9-this is done automatically when you go to paypal.
EIGHT ITEMS
You must have 5 feed backs and contact us before bidding and we will send you a paypal request with a handling/shipping fee of $15
EIGHT TO 30 ITEMS
You must have 10 feedbacks to purchase larger numbers and contact us before bidding.We will send this parcel by courier express with a tracking number for $45
. MONEY BACK GUARANTEE -NO QUESTIONS ASKED,PREFER PAYPAL SEND MONEY TO sedaopals@hotmail.com PLEASE NOTE-We have the following sites listed below so if you pay insurance for one site we can send all the orders to gether so only pay insurance once. There is still the handling fee per item of $3.00
.At www.opalauctions.com we have the following sites
SEDAOPAL-,BOULDER MAGIC-PETERS OPAL-QUALITY OPALS-SEDA ROUGH OPAL,-VOLCANIC OPALS.
At www.gemrockauctions.com we have the following sites
SEDAGEMS-MINERALGEMWORLD-GEMS TO WEAR
Payment Options
Questions & Comments
Similar Auctions
 |
 |
 |
 |
 |
 |
 |
 |
No Comments