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Title:      Necklace.
General:    This pendant is set with a Mabe Pearl.
Material:   Sterling Silver.
Gem:        Mabe Pearl
Method:     Hollow, Constructed.
Finish:
Mechanics:  The pearl is set from behind.
Designer:   W.van Heeckeren.
Craftsman:  W.van Heeckeren.

Price:      AUS $ 900.00.

















STERLING SILVER.


        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.













Technical Data for PEARL.


name:                   Mabe PEARL is also known as a blister pearl.
                        it forms as part of the shell and looks like a blister
                        on the inside of the shell.
colour:                 Pink, silver, cream, golden, green, blue, black
colour of streak:       White
mohs hardness:          3-4
specific gravity:       2.60-2.78
cleavage:               None
fracture:               Concoidal or scaly
crystal system:         Microcrystalline
chemical composition:   84-92% calcium-carbonate, 4-13% organic substances,
transparency:           Translucent to opaque
refractive index:       1.52-1.66 Black: 1.53-1.69
double refraction:      Weak or none
dispersion:             None
pleochroism:            None
absorption spectrum:    Not usable
fluorescence:           Weak; not usable. Natural black: red-reddish