Eastern
Gemology
Diseases &
gems
Gem Substitutes
Gems for
Health
Gems
Installation of Gems
Power of
Colors
Rashi stone
Relation
of the Planets
There are two types of man-made substitutes, synthetics and simulants. A
synthetic gem is made of exactly the same substance as the natural gem, but it
is grown in a laboratory. It can sometimes be difficult to tell a natural gem
from a synthetic one. Natural stones often have inclusions, which help with
identification. Synthetics sometimes have lines or bubbles by which they can be
identified.
Occasionally, a substitute
substance or gem may be passed off as the real thing. For example, a
cheaper gem may be substituted for a more expensive one—citrine quartz can be
substituted for the more precious topaz. Such substitutions are fraudulent.
Simulants are not composed of
exactly the same substance as real gems, but when one examines them, they appear
to closely resemble the natural stone. Cubic zirconia (zirconinum oxide) highly
resembles a diamond and may be sold as such. Imitation gems are often made of
glass, plastic, or a combination of two (doublets) or three (triplets)
substances. The parts may be imitation or real.
Constellations and Gems
Each constellation is ruled by a particular planet and is related to a
particular gemstone:
|
Twenty-seven |
Planets |
Gemstones |
|
|
Constellations |
|
|
|
Ashwini |
Ketu |
Cat’s Eye |
|
|
Bharani |
Venus |
Diamond |
|
|
Krittika |
Sun |
Ruby |
|
|
Rohini |
Moon |
Pearl |
|
|
Mrigashira |
Mars |
Coral |
|
|
Ardra |
Rahu |
Hessonite |
|
|
Punarvasu |
Jupiter |
Yellow Sapphire |
|
|
Pushya |
Saturn |
Blue Sapphire |
|
|
Ashlesha |
Mercury |
Emerald |
|
|
Magha |
Ketu |
Cat’s Eye |
|
|
Purva Phalguni |
Venus |
Diamond |
|
|
Uttar Phalguni |
Sun |
Ruby |
|
|
Hasta |
Moon |
Pearl |
|
|
Chitra |
Mars |
Coral |
|
|
Swati |
Rahu |
Hessonite |
|
|
Vishakha |
Jupiter |
Yellow Sapphire |
|
|
Anuradha |
Saturn |
Blue Sapphire |
|
|
Jyeshtha |
Mercury |
Emerald |
|
|
Mula |
Ketu |
Cat’s Eye |
|
|
Purva Shadha |
Venus |
Diamond |
|
|
Uttar Shadha |
Sun |
Ruby |
|
|
Shravana |
Moon |
Pearl |
|
|
Dhanistha |
Mars |
Coral |
|
|
Purva Badra |
Jupiter |
Yellow Sapphire |
|
|
Uttar Bhadra |
Saturn |
Blue Sapphire |
|
|
Revati |
Mercury |
Emerald
|
|
