SHOW: Rings 296
Title: Ring. General: This is a pair of Sterling Silver Wedding Rings, set with Citrines. Material: Sterling Silver. Gem: Citrine. Method: Cast. Finish: Polished Mechanics: Bezel set. Designer: W.van Heeckeren. Craftsman: W.van Heeckeren. Availability: This pair is not for sale. Price: AUS $ 250.00 each.
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.
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.
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.
name: CITRINE (quartz group) colour: Light yellow to gold-brown colour of streak: White mohs hardness: 7 specific gravity: 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: Natural: Weak; yellow-light yellow. Heat-treated: 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.