SHOW: Rings 302
Title: Ring.
General: This Ring is made in 18 Karat white and yellow gold, and is
set with an Argyle Pink Diamond.
Material: White Gold.Yellow Gold.
Gem: Pink Arfyle Diamond, Marquise cut.
Method: Cast.
Finish: Polished.
Mechanics: Carved. Because the diamond is a light pink, the area below it is
clad in Yellow Gold, as this adds a slight richness to the colour
reflected in the diamond.
Designer: W.van Heeckeren.
Craftsman: W.van Heeckeren.
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.
18K GOLD is a Gold alloy consisting of:
750 parts/1000 Pure Gold.
100 parts/1000 Pure Nickel.
100 parts/1000 Pure Palladium.
50 parts/1000 Pure Zinc
Annealing temperature: 700 degrees Celsius.
Melting Temperature: 1200 degrees Celsius.
Wal.
CASTING is a method by which molten metal is poured into a mould
in order to achieve the desired shape. In the "Lost
Wax" method, an accurate wax model is made. The wax
model is invested (put in a chrystobalite plaster),
after the investment has set, the wax is burned out in
a Kiln. This leaves a negative cavity into which the
molten metal may be poured.
Wal.
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.