38.55CTS APATITE CALCITE / ETHIOPIAN DOUBLET PENDANT SOJ2588

Item Information

Dimensions (mm) not provided
Weight (carats) not provided
Colors

 

APATITE CALCITE WITH 

ETHIOPIAN DOUBLET

SILVER PENDANT

 

 

Sterling silver

Stamped 925

Weight of stones 12.00 cts app

Amount of silver used 5.31 grams app

Lenght of pendant 40 mm app

  Weight of stones and silver: 38.55 cts app.


 

Apatite is a group of phosphate minerals, usually referring to hydroxylapatite, fluorapatite, and chlorapatite
Apatite is a common mineral, and fine localities are worldwide. Enormous deposits are in the Kola Peninsula, Russia, containing both crystals and botryoidal material. Some of the finest crystals came from Ehrenfriedersdorf, Saxony Germany, where they are blue to purple in color. Colorless, hexagonal crystals were found in the Tyrol, Austria, and excellent material from Panasqueira, Portugal. Deep blue crystals are found in Campo Formosa, Bahia, Brazil, and in Sri Lanka. Enormous deposits mined for industrial use exist in Nauru, Morocco, Algeria, Tunisia, Egypt, and Israel. 
Perhaps the most famous specimens are the gemmy yellow crystals from Cerro del Mercado (near Ciudad Durango), Durango, Mexico. In Ontario, Canada, large greenish-brown crystals come from Wilberforce, Haliburton Co., and the Bancroft area. Also in Canada is Otter Lake, Quebec, where large crystals occur on a matrix of orange 
Calcite
.
In the U.S., famous violet crystals come from the Mount Apatite area (Hebron), Androscoggin Co., Maine. Prismatic green crystals closely resembling Tourmaline is found in Mesa Grande, San Diego Co., California.
CALCITE

It has a defining Mohs hardness of 3, a sp of 2.71, and its luster is vitreous in crystallized varieties. Color is white or none, though shades of gray, red, orange, yellow, green, blue, violet, brown, or even black can occur when the mineral is charged with impurities.

Calcite is transparent to opaque and may occasionally show  fluorescence. A transparent variety called Ice land spar  is used for optical purposes. Acute scalenohedral crystals are sometimes referred to as "dogtooth spar" while the rhombohedral form is sometimes referred to as "nailhead spar".

 

 

This is a Ethiopian doublet that has  been well polished. This is a doublet made from natural welo crystal mounted on to ironstone backing.We have cut the crystal a bit thicker than we would on a australian doublet. This opal is hydrophane [absorbes water] so in wet weather it will look brighter.

2d 17h 42m 40s

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Pricing & Details

Bid Increment $1.00
Starting Bid $95.00
Auction ID 382983
Watchers 4 watching
Viewed 607 times
Starts 18th Sep 2017 4:03pm PDT
Ends 23rd Sep 2017 4:00pm PDT

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