SHOW: Earrings 02

Title:      Earrings.
General:    These 18K Gold earrings are set with cultured Pearls, and
            encompass the ear. The pearl on the earlobe locks them in place.
Material:   18K Gold.
Gem:        Miki Moto Cultured Pearls.
Method:     constructed.
Finish:     Polished.
Mechanics:  The pearl on the earlobe locks them in place.
Designer:   Walraven van Heeckeren.
Craftsman:  Walraven van Heeckeren.

Availability:   On special order only.

Price:      AUS $ 3600.00.


               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.


Technical Data for PEARL.

name:                   PEARL
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

Miki Moto.

        Miki Moto is a Japanese company, which grows cultured
                        pearls of very high quality.



               Cultured Pearls are created by artificially inserting
                        a small sphere made from pearlite (the pearly
                        coating on the inside of a shell), into the Oyster
                        so that it irritates the Oyster. The Oyster then
                        coats this irritant with more pearlite in order to
                        protect itself. The smaller the irritant sphere,
                        the longer it takes for a pearl to grow to any size.
                        Cheap cultured pearls start with a large sphere,
                        while expensive cultured pearls start with small
                        spheres. As an example, Miki Moto cultured Pearls
                        take three years to grow to about 3 mm in diameter,
                        and most of this is deposited by the Oyster.