SHOW: Earrings 29


Title:      Earrings.
General:    These are 18K Gold Earstuds. The disk shapes can be removed
            from the post, so that the earstud may be worn as a "Solitaire".
Material:   18K Gold.
Gem:        Diamonds.
Method:     Constructed from sheet metal, Bead Set.
Finish:     Polished
Mechanics:  Standard Butterfly Posts.
Designer:   Walraven van Heeckeren.
Craftsman:  Walraven van Heeckeren.

Price:      AUS $ 12000.00.













18K GOLD.


        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.












Technical Data for DIAMOND.


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.


BEAD SETTING.


        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.