Steatite derives its name from the Greek word STEAR, fat, which well
describes the greasy feel of this soft magnesian rock—a massive variety
of talc. It was extensively used by the ancient Egyptians who cut it
into scarabs which in many cases they first burnt and then coated with a
vitreous blue or green glaze. The substance is extremely soft and can
easily be cut with a knife. Soapstone figures are cut from a variety
known as PINITE—the Agalmatolite or Pagodite of China, called by them
Hoa-chi. Many of these are very beautifully cut, a number being lucky
figures presented in the guise of gods and goddesses, flowers, fruits,
etc. This custom reminds of the “Household gods” of the ancients. A kind
of soft steatite earth is still eaten by the savages of New Caledonia
and other places.
All varieties of Steatite are under the zodiacal Taurus.
SPHENE OR TITANITE
Sphene derives its name from the Greek SPHEN, a wedge. As the name
indicates the form of the crystals is wedge-shaped. The lustre is very
brilliant but the stone is scarcely as hard as the opal and therefore is
little used in jewellery.
Sphene is under the zodiacal Sagittarius.
SPINEL OR BALAS RUBY
Spinel, which derives its name from the Greek word SPINOS, a spark, is
found written in a variety of ways, chief amongst which are spinell,
spinele, spinel. Its colours are red, brown, green, yellow and blue. The
red varieties are clear and glittering and the dark generally more dense
or opaque.
The name Spinel is applied to those of bright red colour
The name Balas is applied to those of rose red
The name Rubicelle is applied to those of orange red
The name Almandine Ruby is applied to those of violet
The name Chloro Spinel is applied to those of green
The name Ceylonite or Pleonaste is applied to those of black
The name Sapphirine is applied to those of blue
Spinel and Balas are often intermixed and both terms are accepted as
denoting this Aluminate of Magnesium, whose hardness is just a little
inferior to the Corundum and whose crystalline form is isometric, like
the diamond. The spinel, however, is non-electric, no matter if
submitted to heat or friction, whilst the ruby (Corundum), and garnet
are highly so. Hence it is not a difficult matter to distinguish these
stones from each other even if their outward similarities tend to
confuse the eye. The spinel, submitted to trial by heat, first changes
from red to brown; if left to cool it becomes dark; then it changes to
green; then, as if exhausted, it seems to lose its colour which,
however, slowly reappears in its red expression.
Public-domain text, read in full here on John Shaqi.
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