SHOW: Earrings 33
Title: Earrings.
General: This is an 18K pair of earrings, with western Australian Tigers
Eye stones. The gold colour in the stones is embedded Iron Pyrite.
Each earring is set with a small diamond in the centre. This
Diamond setting serves as a pivot for the Tiger Eyes to rotate on.
Material: 18K Gold.
Gem: Tiger Eye. Diamond
Method: Constructed,
Finish: Polished.
Mechanics: Standard earwire, Bezel set diamonds.
Designer: Walraven van Heeckeren.
Craftsman: Walraven van Heeckeren.
Availability: This pair is currently Available.
Price: AUS $ 1250.00.
18K GOLD is a ternary Gold alloy consisting of:
750 parts/1000 Pure Gold.
125 parts/1000 Pure Silver.
125 parts/1000 Pure Copper.
Annealing temperature: 750 degrees Celsius.
Melting Temperature: 950 degrees Celsius.
Wal.
Bezel Setting is done by making a sheet metal surround (the
bezel) for the stone. Once the jewelry has been finished
the stone is then set. In setting the stone, the stone is
placed in the bezel, and the bezel is shrunk in around the
stone, by pushing it in little by little evenly around the
circumference, until the metal seals tight against the
stone. As a finishing touch a flat graver is used to bright
cut the edge of the bezel at right angles to the plane of
the bezel.
Wal.
name: TIGER'S EYE (Quartz group) colour: Gold-yellow, gold-brown colour of streak: Yellow-brown mohs hardness: 7 specific gravity: 2.64-2.71 cleavage: None fracture: Fibrous crystal system: Hexagonal (trigonal); fibrous aggregate chemical composition: SiO2 silicin dioxide transparency: Opaque refractive index: 1.544-1.553 double refraction: +0.009 dispersion: 0.013 pleochroism: None absorption spectrum: Not usable fluorescence: None
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.
name: DIAMOND
colour: Colorless, yellow, brown, sometimes green, blue, reddish, black
colour of streak: None possible
mohs hardness: 10
specific gravity: 3.47 - 3.55
cleavage: Perfect
fracture: Conchoidal to splintery.
crystal system: Isometeric ( cubic ); mainly octahedrons, also
rhombic dodecahedrons, cubes, twins, plates.
chemical composition: C, crystalised carbon.
transparency: Transparent.
refractive index: 2.417 - 2.419
double refraction: None, often anomalous.
dispersion: 0.044
pleochroism: None.
absorption spectrum: Colorless to yellow: 4780, 4650, 4510, 4350, 4015,
4230, 4155, 3900 Blue-green: ( 5370 ), 5040, ( 4980 )
fluorescence: Variable; Colorless and yellow: mostly blue. Brown
and green: often green.