SHOW: Miscellaneous 35
Title: Miscellaneous. General: This Pen, uses a standard Parker roller ball refill. The body is made in Sterling Silver, The knob is a Citrine, and the decoration is 24K Gold. Material: Sterling Silver, 24K Gold. Gem: Citrine. Method: Constructed. Finish: Polished Gold, Cross hatch linish Silver. Mechanics: The mechanics are made in sterling silver. The stone unscrews to give access to the refill. The spring clip is laminated with Stainless Steel. Designer: Walraven van Heeckeren. Craftsman: Walraven van Heeckeren. Price: AUS $ 5500.00.
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.
24 K GOLD is a pure precious metal: 1000 parts/1000 Pure GOLD. Annealing temperature: 800 degrees Celsius. Melting Temperature: 1062 degrees Celsius. 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 prisims 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 usuable 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 CYRSTAL, 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.
LINISHING is a surface finish, achieved by using coarse emery paper/cloth to create parallel lines in the surface of the object. When very fine emery is used, it is called a "satin finish". In Industry a machine called a "linisher" is used. This is basically a belt sander. Wal.