SHOW: Rings 260

Title:      Ring.
General:    This ring is made from Sterling Silver, and is set with two
            identical Lapis Lazuli stones set back to back.
Material:   Sterling Silver.
Gem:        Lapis Lazuli.
Method:     Raised, Constructed.
Finish:     Polished
Mechanics:  The stones are partial Bezel set at the
            narrow ends.
Designer:   W.van Heeckeren.
Craftsman:  W.van Heeckeren.

Availability:   This Ring is currently Available.

Price:      AUS $ 550.00.


        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.


Technical Data for LAPIS LAZULI.

name:                   LAPIS LAZULI
colour:                 Blue
colour of streak:       Light blue
mohs hardness:          5-6
specific gravity:       2.4-2.9
cleavage:               None
fracture:               Conchoidal, grainy
crystal system:         Isometric; crystals rare, mostly dense, grainy aggregate
chemical composition:   Na8 (Al6Si6O24)S2 sulphur containing sodium silicate
transparency:           Opaque
refractive index:       About 1.50
double refraction:      None
dispersion:             None
pleochroism:            None
absorption spectrum:    not usable
fluorescence:           Strong;   white


        Bezel Setting is done by making a sheet metal surround (the
                bezel) for the stone.  Once the jewelry has been finished
                the stone is then set.  In setting the stone, the stone is
                placed in the bezel, and the bezel is shrunk in around the
                stone, by pushing it in little by little evenly around the
                circumference, until the metal seals tight against the
                stone. As a finishing touch a flat graver is used to bright
                cut the edge of the bezel at right angles to the plane of
                the bezel.



                Raising is a method of shrinking sheet metal in order to
                        form hollow shapes.  For instance:  a bowl, or a
                        jug may be raised from flat sheet metal in one
                        single   piece.    During  the  process  the  metal
                        actually thickens.