SHOW: Necklaces73
Title: Necklace.
General: This Choker is made from Sterling Silver, and is set with a
removable Amethyst, so that the Choker may be worn on it's own,
and the Amethyst may be worn on a different band.
Material: Sterling Silver.
Gem: Amethyst.
Method: Constructed.
Finish: Polished.
Mechanics: The catch is a lockover type, making the band adjustable.
Designer: W.van Heeckeren.
Craftsman: W.van Heeckeren.
Availability: This Choker is available on special order and the stone will have to be negotiated.
Price: AUS $ 1200.00.
STERLING SILVER is a binary Silver alloy consisting of:
925 parts/1000 Pure Silver and
75 parts/1000 Pure Copper.
Annealing temperature: 750 degrees Celsius.
Melting Temperature: 950 degrees Celsius.
Wal.
name: AMETHYST (quartz group) colour: Violet, pale red-violet colour of streak: White mohs hardness: 7 specific gravity: 2.63-2.65 cleavage: None fracture: Conchoidal, very brittle crystal system: Hexagonal (trigonal);hexagonal prisms chemical composition: silicon dioxide transparency: Transparent refractive index: 1.544-1.553 double refraction: +0.009 dispersion: 0.013 pleochroism: Very weak; violet, gray violet absorption spectrum: (5500-5200) fluorescence: Weak; greenish
QUARTZ: Minerals of the same or similar chemcial composition are included
under the single group of Quartz (SiO2 resp. SiO2.nH2O)
silicon dioxide:
Macrocrystalline quartz includes AMETHYST, AVENTURINE, ROCK CRYSTAL,
CITRINE, PRASE, HAWK'S EYE, QUARTZ CAT'S EYE, SMOKY QUARTZ, ROSE
QUARTZ and TIGER'S EYE.
Microcrystalline quartz includes CHALCEDONY GROUP - AGATE, FOSSILISED WOOD,
CHROPRASE, HELIOTROPE, JASPER, CORNELIAN, MOSS AGATE, ONYX and
SARD.
Amorphous quartz includes OPAL GROUP - PRECIOUS OPAL, FIRE OPAL and common
opal.