SHOW: Necklaces 34


Title:      Necklace.
General:    This necklace is constructed fromn 18K Gold and set with a
            Baguette Diamond, the chain is constructed from 18K Gold.
Material:   18K Gold.
Gem:        Diamond.
Method:     Flame textured, Constructed.
Finish:     Polished.
Mechanics:  The catch is a ball and slot type.
Designer:   Walraven van Heeckeren.
Craftsman:  Walraven van Heeckeren.

Price:      AUS $ 11000.00.











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.

FLAME TEXTURING.


       Flame  Texturing is done by putting the sheet metal on a flat
                        fire resistant surface, and heating the metal
                        until the surface begins to melt. By using various
                        types of flame, (reducing or oxydising or
                        combinations thereof) various surface textures can
                        be achieved. in recent times this is sometimes
                        referred to as reticulation.

                                                    Wal.