SHOW: Rings 104
Title: Ring. General: 18K Gold Ring set with Ruby Cabouchons. Material: 18K Gold. Gem: Ruby. Method: Cast. Finish: Polished. Mechanics: Bezel/Bead Set. Designer: W.van Heeckeren. Craftsman: W.van Heeckeren. Price: AUS $ 8000.00.
name: RUBY colour: Varying red colour of streak: White mohs hardness: 9 specific gravity: 3.97-4.05 cleavage: None fracture: Small conchical, uneven, splintery, brittle crystal system: Hexagonal ( trigonal ); hexagonal prisms or tablets, rhombohedrons chemical composition: AI203, alumiinium oxide transparency: Opaque, translucent, transparent refractive index: 1.766 - 1.774 double refraction: 0.008 dispersion: 0.018 pleochroism: Strong; yellow-red, deep ruby-red absorption spectrum: 6942, 6928,66680,6592, 6100-5000, 4765, 4750, 4685 fluorescence: Strong; ruby-red
CASTING is a method by which moulten metal is poured into a mold 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 moulten metal may be poured. 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.
In Bead Setting a seat is cut for the stone in the object, small amounts of metal are then raised out of the surrounding metal with an engraving tool, and pushed over the stone, to act as claws. These claws are then tightened down onto the stone with a small tool with a concave end. By rotating this tool over the claw, the claw is formed into a small ball or bead. The tool is called a beading tool. Wal.
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.