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Gem
Facts
Geology & Description of Gemstones
| Benitoite |
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This
exquisitely beautiful and rare gem is seldom seen in jewelry,
but is very popular among collectors and connoisseurs. Discovered
in San Benito, CAlifornia - hence the name benito-ite - it was
recently selected as the official state stone of California
and we are beginning to see more of it in fine jewelry houses
there.
Benitoite
ranges from colorless to dark blue (often with a violet tint)
to violet. A rare pink variety has also been identified. Benitoite
can display "fire," the dispersion of white light
into the rainbow colors, comparable to a diamond, and is also
very brilliant. Some might easily mistake it at a glance for
a blue diamond. It lacks diamond's incredible hardness, however,
and is more comparable to amethyst or tanzanite, in hardness.
It is difficult to find benitoite in sizes over one carat; only
about five stones per year are cut which weight two carats or
more; only one every five years yields a stone five carats or
more. Benitoite's rarity keeps it very expensive - a fine one-carat
stone could easily cost $3,000 - and tw0-carat sizes with fine
color are extremely rare and even more costly. The largest fine
benitoite known weights just over 7 3/4 carats, and is on display
at the Smithsonian Institution in Washington, D.C.
For
jewelry, benitoite is a relatively wearable stone, but given
its rarity and value, we recommend that it be set in a somewhat
protective mounting so that it is not easily subjected to accidental
scratching or wear.
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| Beryl
(Golden
Beryl, Red Beryl, Morganite) |
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As
early as A.D. 1220 the virtues of beryl were well established
in legend. Beryl provided help against foes in battle or litigation,
made the wearer unconquerable, but at the same time friendly
and likable, and also sharpened the wearer's intellect and cured
laziness. Today, beryl is still considered important, but primarily
for aesthetic reasons. the variety of colors in which it is
found, its wonderful clarity (except for emerald), its brilliance,
and its durability (again with the exception of emerald) have
given the various varieties of beryl tremendous appeal.
Most
people are familiar with the blue variety of beryl, aquamarine,
and the green variety, emerald. Few as yet know the pink variety,
morganite, and the beautiful yellow to yellow green variety,
referred to as golden beryl. These gems have only recently found
their place in the jewelry world but are already being shown
in fabulous pieces made by the greatest designers. While not
inexpensive, they still offer excellent value and beauty.
Beryl
has also been found in many other colors - lilac, salmon, orange,
sea green, as well as colorless. While most of these varieties
are not as yet available to any but the most ardent rock hound,
the orange varieties are fairly common and can still be found
for under $125 per carat.
The
rarest color is red, which is even more rare than emerald, and
comparable in cost. Until recently, it was known only to serious
collectors and was called "Bixbite," after the man
who discovered it. The gem variety of red beryl was discovered
in Utah, still its only known source. But thanks to the discovery
of a new desposit, we are now beginning to see this exciting
gemstone in the jewelry market. It faces a major problem, however
- what to call it. Some dealers are calling it "red emerald"
because it is the same basic material as emerald and because
it is truly comparable to emerald in rarity, beauty, and value.
Whatever the name by which it is called - red emerald, red beryl,
of "Bixbite" - it is a beautiful gem that should be
loved and cherished by anyone lucky enough to own one.
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| Bloodstone
(Heliotrope) |
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Believed
by the ancient Greeks to have fallen from heaven, this stone
has held a prominent palce throughout history, and even into
modern times, as a great curative. It was (and still is in some
parts of the world) believed capable of stopping every type
of bleeding, clearing bloodshot eyes, acting as an antidote
for snakebite, and relieving urinary troubles. Today there are
people who wear bloodstone amulets to prevent sunstrokke and
headache, and to provide protections against the evil eye.
The
birthstone for March, bloodstone is a more or less opaque. dark
green variety of quartz with specks of red jasper (a variety
of quartz) spattering red throughout the dark greenfield. Particularly
popular for men's rings (perhaps they need more protection from
illness?) bloodstone is most desirable when the green isn't
so dark as to approach black and the red flecks are roundish
and pronounced. It is moderately durable and is fairly available
and inexpensive.
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| Chrysoberyl
& Cat's-Eye |
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The
chrysoberyl family is very interesting because all three of
its varieties - alexandrite, cat's-eye, and chrysoberyl - while
chemically alike, are quite distinct from one another in their
optical characteristics and bear no visible resemblance to each
other.
Chrysoberyl
in its cat's-eye variety has long been used as a charm to guard
against evil spirits, and one can inderstand why, given the
pronounced eye effect; the eye, so legend has it, could see
all and it watched out for its wearer. But it was also believed
that to dream of cat's-eye signified treachery. On still another
level, it symbolized long life for the wearer, perhaps as a
result of being protected from the evil eye.
Cat's-eye
is a hard, translucent gem ranging in color from a honey yellow
or honey brown to yellowish green to an almost emerald green.
It has a velvety or silk-like texture, and when properly cut
displays a brilliant whitish line of light right down the center,
appearing almost to be lighted from inside. Genuine cat's-eye
should not be confused with the common quartz variety, which
is often brown, and called tiger eye; the latter has a much
less striking eye and weaker color altogether. This phenomenon
is produced only in cabochons (cabs).
The
stone called chrysoberyl, on the other hand,is a brilliant,
transparent, very clear, and very durable stone found i yellow,
yellow green, and green varieties. This is another stone that
still offers excellent value. It's a real beauty, very moderately
priced, and just beginning to be appreciated and used in contemporary
jewelry.
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| Chrysoprase
& Carnelian |
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Chrysoprase
has long been the subject of marvelous stories. In the 1800s,
it was believed that a thief sentenced to be hanged or beheaded
would immediately escape if he placed a chrysoprase in his mouth.
Of course, it might be hard to obtain the stone unless he just
happened to carry on e around! And Alexander The Great was believed
to have worn a "prase" in his girdle during battle,
to ensure victory.
Chrysoprase
is an inexpensive, highly translucent, bright, light to dark
green variety of quartz. While its color is often very uniform
and can be very lovely in jewelry, for many years these gems
have been dyed to enhance their color, where necessary. Chysoprase
is another stone that is usually cut in cabcochon style. It
has become very popular for jewelry as a fashion accessory.
Do not confuse it with jade, however. It is sometimes called
"Australian Jade" and is sometimes misrepresented
as real jade.
If
you're the timid sort, carnelian is the stone fro you. "The
wearing of carnelian is recommended to those who have a weak
voice or are timid in speech, for the warm-colored stone will
give them the courage they lack, so that they will speak both
boldly and well," reports G.F. unz, a turn-of-the-century
gemologist and historian.
This
stone is especially revered by moslems, because Muhammad himself
wore a silver ring set with a carnelian engraved for use as
a seal.
Carnelian,
one of the accepted birthstones for August, is a reddish orange
variety of quartz. A moderately hard, translucent to opaque
stone, its warm uniform color and fair durability have made
it a favorite. It is often found in antique jewelry and lends
itself to engraving or carving (especially in cameos). It is
still a relatively inexpensive stone with great warmth and beauty
and offers an excellent choice choice for jewelry to be worn
as an accessory with today's fashion colors.
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| Garnet |
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If
you are loyal, devoted, and energetic, perhaps the garnet is
your stone. Or if not, perhaps you should obtain some! Red garnets
were "known" to promote sincerity, stop hemorrhaging
or other loss of blood, cure inflammatory diseases, and cure
anger and discord. And if you engrave a well-formed lion upon
a garnet, it will protect and preserve health, cure the wearer
of all disease, bring him honors, and guard him from all perils
in traveling. All in all, quite a worthwhile stone.
The
garnet family is one of the most exciting families in the gem
world. A hard, durable, often very brilliant stone, available
in many colors (greens, reds, yellows, oranges), it offers far
greater versatility and opportunity for the jewelry trade than
has yet been capitalized upon. Depending upon the variety, quality,
and size, lovely garnets are available for under $40 per carat
or more than $5,000 per carat. Garnet can also be mistaken for
other, usually more expensive, gems; green garnet, tsavorite,
is one of the most beautiful, and all but a few would assume
it was an emerald of the finest quality. In fact, it is clearer,
more brilliant, and more durable than emerald itself. There
is also a rarer green garnet, called demantoid, which costs
slightly more than tsavorite but which although slightly softer,
has more fire. These gems offer fine alternatives to the person
desiring a lovely green gem who can't afford emerald. While
still rare, expensive gems themselves, these garnet varieties
are far less expensive than an emerald of comparable quality.
Garnet also occurs in certain shades of red that have been taken
for some varieties of ruby. And in yellow it has been confused
with precious topaz.
Garnet
is found in almost every color and shade, including a rare color-change
variety that appears red in incandescent light and blue (the
only color not normally seen in garnet) in daylight or fluorescent
light. It is best known in a deep red variety, but is commonly
found in orangish brown shades and brilliant wine red shades
as well. Other colors include orange - the new "Mandarin"
garnet being an intense fiery red-orange - red purple, violet
and pink. A nontransparent variety, grossularite, resembles
jade and may be mistaken for jade in cabochons and carvings.
A
star garnet found in the United States is a reddish to purple
variety that displays a faint four-rayed or six-rayed star,
similar to the six-rayed star ruby but not as pronounced.
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| Hematite
& Marcasite |
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Hematite
is a must of the lawyer, for it ensures for its wearer "alertness,
vivacity, and success in litigation." It is also believed
to ensure sexual impulse, so if you know of someone with a problem,
thai may make a "thoughtful" gift.
Hematite
is an iron oxide (like iron rust), a metallic, opaque stone
found in iron-mining areas. It takes a very brilliant, metallic
polish that can look almost like silver, or almost pure black,
or gun-metal blue. It was and is poplual for use in carving
hollow cameo portraits known as intaglio.
Marcasite,
the tiny, glittering stone with a brassy-colored luster often
seen in old belt buckles and costume jewelry, is a relative
of hematite. Most "marcasite" seen in jewelry is not
marcasite, but pyrite (fool's gold) - another brassy-colored
metalic mineral.
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