SHOW:  Miscellaneous 35
Title:      Miscellaneous.
General:    This Pen, uses a standard Parker roller ball refill.
            The body is made in Sterling Silver, The knob is a Citrine,
            and the decoration is 24K Gold.
Material:   Sterling Silver, 24K Gold.
Gem:        Citrine.
Method:     Constructed.
Finish:     Polished Gold, Cross hatch linish Silver.
Mechanics:  The mechanics are made in sterling silver. The stone unscrews
            to give access to the refill. The spring clip is laminated with
            Stainless Steel.
Designer:   Walraven van Heeckeren.
Craftsman:  Walraven van Heeckeren.

Price:      AUS $ 5500.00.

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.

24K GOLD.

               24 K GOLD is a pure precious metal:
                        1000 parts/1000 Pure GOLD.
 Annealing temperature: 800 degrees Celsius.
   Melting Temperature: 1062 degrees Celsius.

                                                    Wal.

Technical Data for CITRINE.

name:                   CITRINE (quartz group)
colour:                 Light yellow to gold-brown
colour of streak:       White
mohs hardness:          7
specific gravity:       2.65
cleavage:               None
fracture:               Conchoidal, very brittle
crystal system:         Hexagonal (trigonal);hexagonal prisims
chemical composition:   silicon dioxide
transparency:           Transparent
refractive index:       1.544-1.553
double refraction:      +0.009
dispersion:             0.013
pleochroism:            Natural: Weak; yellow-light yellow. Heat-treated: none
absorption spectrum:    Not usuable
fluorescence:           None

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  CYRSTAL,
        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.

LINISHING.

        LINISHING is a surface finish, achieved by using coarse emery
                  paper/cloth to create parallel lines in the surface of
                  the object.  When very fine emery is used, it is called a
                  "satin   finish".    In   Industry  a  machine  called  a
                  "linisher" is used.  This is basically a belt sander.

                                                    Wal.