Amethyst is the recognized birthstone for February and the accepted
anniversary gemstone for the
sixth year of marriage. The transparent purple variety of quartz is one of the
most popular of color gems.
It was once believed to prevent the wearer from getting drunk, and if the circle of the sun or moon was
engraved thereon, it was believed to prevent death from poison. Amethyst was said to have a
sobering affect on the wearer-not only those who indulged, but on those over-excited by love's passion as
well. The
name Amethyst comes from the Greek word amethystos, meaning not drunken.
Amethyst is one of the best stones to use for relieving tension and developing
patience due to its calming mental effect. Ancient traditions held that genuine
Amethysts were ruled by Saturn and focused the planet's energy to protect
travelers against danger, clear mental unrest, bring luck to gamblers and
prevent intoxication.
It has symbolized peace, protection and tranquility. Some say it will
prevent baldness and improve the complexion, as well as protect from treason
and deceit. Because royalty has always adored
the color purple, amethysts abound in the ornaments of ancient Greeks and
Egyptians, and in the British Crown
Jewels.
Available in shades from light to dark purple, it is
relatively hard, fairly brilliant, and overall a good, versatile, wearable
stone, available in good supply even in very large sizes (although large sizes with deep color are
now becoming scarce). The
deepest color, especially with flashes of red against a deep purple background,
is referred to as Siberian. The term usually implies a color rather than a
locality. Amethysts are sometimes heat treated to intensify the royal purple
color (400C to 600C). Jewelers use care to protect Amethysts from excessive heat
(i.e., resizing a ring). Amethyst is a durable stone and the color is permanent
for all consumer uses. Most Amethysts exhibit zoning of color, especially in
large darker stones.
Amethyst is probably one of the
most beautiful stones available at a
moderate price, although one must be careful because "fine" amethyst is being produced synthetically
today. It frequently exhibits color zoning (often looking
like chevrons). Amethyst may fade from heat and strong sunshine.
As with all gemstones, care should be taken to protect
it from scratches and sharp blows.
TREATMENT:
Sometimes heat treated to lighten and intensify color
MOHS HARDNESS: 7 (a durable stone subject to normal wear and care)
CHEMICAL COMPOSITION: SiO 2
REFRACTIVE INDEX: o=1.544, e=1.553 (very constant)
(The angle light is bent traveling through a gemstone)
DENSITY (SPECIFIC GRAVITY): 2.651 (very constant)
(The number of times heavier a gemstone is compared to water)
PRINCIPAL SOURCES: Brazil, Uruguay, Zambia, SW Africa, Arizona