SHOW: Necklaces73


Title:      Necklace.
General:    This Choker is made from Sterling Silver, and is set with a
            removable Amethyst, so that the Choker may be worn on it's own,
            and the Amethyst may be worn on a different band.
Material:   Sterling Silver.
Gem:        Amethyst.
Method:     Constructed.
Finish:     Polished.
Mechanics:  The catch is a lockover type, making the band adjustable.
Designer:   W.van Heeckeren.
Craftsman:  W.van Heeckeren.

Availability:   This Choker is available on special order and the stone will have to be negotiated.


Price:      AUS $ 1200.00.












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 AMETHYST.


name:                   AMETHYST (quartz group)
colour:                 Violet, pale red-violet
colour of streak:       White
mohs hardness:          7
specific gravity:       2.63-2.65
cleavage:               None
fracture:               Conchoidal, very brittle
crystal system:         Hexagonal (trigonal);hexagonal prisms
chemical composition:   silicon dioxide
transparency:           Transparent
refractive index:       1.544-1.553
double refraction:      +0.009
dispersion:             0.013
pleochroism:            Very weak; violet, gray violet
absorption spectrum:    (5500-5200)
fluorescence:           Weak; greenish




Technical Data for QUARTZ.


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  CRYSTAL,
        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.