knowledge of gemstones (ruby, emerald and sapphire) will help you
understand and retain what a jeweler tells you. This gemstone guide
will help you in evaluating the quality of ruby, emerald and
sapphire, an aid in avoiding fraud with information on immitation
(synthetic and treatment), as a handy reference on colored gemstones,
provide a collection of practical tips on choosing and caring for
gems and a challenge to view colored gemstones through the eyes of
gemologists and gem dealers. When gemologists speak of shape, they
usually mean its face up outline. The most common gemstone shapes
include round, oval, square, pears, marquise and octogon. To learn
is often used as another word for treatment. Enhancement also refers
to the faceting and polishing of a gem. For centuries, ruby, emerald
and sapphire have been in heat treated to improve their color. Heat
treating is widely accepted because it is a continuation of a natural
process and it causes a permanent improvement of the entire gemstone.
From the standpoint of value, it does not matter whether commercially-quality
stones have been treated or not as long as the color is permanent.
The overall quality of the treated stone will determine the price.
However, a premium may be charged for high-quality untreated stones
that comes with a lab report stating there is no evidence of heat treatment.
Gemological Society: Since 1934, American Gem Society (AGS) has
been protecting the consumers. For 70 years, the AGS logo has been a
symbol of excellence in the jewelry industry. As an association of
fine jewelers, our members are committed to the highest ethics, and
practice truth-in-advertising and pricing. To visit AGS website Click
Here. AGS is located at 181 World Trade Center, 2050
Stemmons Expressway, Dallas, TX 75027 and their telephone number is
809-972-1162. Jewelers Board of Trade: We are proud member of
the Jewelers Board of Trade (JBT). To visit their
website Click Here.
Unpolished gemstones are typically very rough. Looking at
gemstones straight from the mine, they might be mistaken for pebbles
gemstones available on the open market have been "enhanced"
(i.e. something has been done to make them look better). Gemstones
that have not been enhanced are very rare and command extravagant prices.
There are many
methods of enhancing gemstones. Some of the most common enhancement
treatments are described below. For more information on gemstone
enhancements, visit the American Gem
Trade Association website
The use of
heat to enhance the color of some gemstones is a common practice
around the globe and has been going on for centuries. It is part of
the standard polishing and finishing process for many gemstone
varieties, including aquamarine, citrine, amethyst, sapphire, ruby
and tanzanite, and is accepted by the jewelry industry and the
American Gem Trade Association.
color of heat-treated gemstones is permanent and does not require
special care. Aquamarine, citrine, amethyst, sapphire, ruby and
tanzanite gemstones offered by Blue Nile have been heat treated.
wax and resin are used to improve the clarity of some gemstones. The
colorless oil, wax or resin is infused into surface-reaching fissures
(called inclusions) to improve the stone's appearance. This process
began centuries ago by gemstone merchants who found that immersing
emeralds in clear oil or waxes made them look clearer to the unaided
eye. Today, almost all emeralds are treated in this way. Gemstones
with colorless oil, wax or resin enhancement, including emeralds, can
be harmed if handled roughly. Recommended special care for such
gemstones is avoidance of sudden temperature changes, steaming,
chemicals and ultrasonic exposure.
offered by Sndgems.com may have been treated with colorless oil, wax
"celestial" sapphire, symbol of the heavens, bestower of
innocence, truth, good health, and preserver of chastity, is reserved
today as the birthstone of September. To learn more Click
Here. Guide to Fancy Sapphire Engagement Rings: Page 1, 2,
9, 10, 11, 12, 13, 14. M
e Page 1,2, 3, 4, 5, 6, 7, 8, 9, 10, 11.
"ruby" derives from the Latin word rubeus, which means red.
Ruby is the name given to the red variety of corundum. To learn more Click
Here. Guide to Ruby Engagement Rings: Page 1, 2,
9. Ruby Engagement Ring Guide: Page 1,
2, 3, 4,
5, 6, 7,
Emerald is the
green variety of the mineral beryl used in emerald rings. Physical
Properties: Emerald Color: Emerald Green, green and yellowish green;
Emeralds Moh's Hardness: 7.5-8; Emeralds Density: 2.67-2.78; Emerald
Chemical Composition: Aluminium Berrylium Silicate; Emeralds
Transparency: Transparent to Opaque; Emeralds Refractive Index:
1.565-1.602; Emeralds Dispersion: 0.014; Emeralds Pleochroism:
Definite; green, blue, blue green to yellow green. To
learn more Click