The World's Most Useful
Gem & Jewelry Monthly Newsletter
Written by Carolyn Doyle for customers of
The Dorado Company
and other visitors to the azgem.com website who subscribe.
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Usable Gems... and a little opinion.
Tourmaline is an amazing gem. It has many unique
and desirable characteristics.
Tourmaline makes a great jewelry stone. It's
hardness of 7 to 7.5 on the Moh's
hardness scale and other characteristics make it a durable stone to mount in
Tourmaline occurs in relatively large sizes.
Multi-carat gems are available and popular.
Tourmaline is an affordable gem. It occurs in many
locations throughout the world. Notable locations include:
Maine and California in the
West Africa, including
Nigeria, Chad, and Namibia
East Africa, including
Tanzania, Kenya, Mozambique, and Madagascar
Central Asia, including
Pakistan, Afghanistan, and Tajikistan
Tourmaline's relative abundance makes it affordable.
Tourmaline's beauty makes it desirable.
Tourmaline is a colorful gemstone. In fact, it's
THE most colorful gem. Tourmaline occurs in more colors and color combinations
than any other gem stone.
Tourmaline continues to be discovered in previously
unknown colors, shades, and color intensities.
Paraiba tourmaline was discovered in 1987 in Brazil's
northeastern Paraiba state.
Paraiba tourmaline is
unique due to its color intensity. These gems are described as
having vivid, electric colors. The hues range from bright blue to blue-green to
Traces of copper give these gems their intense colors.
More recently, intensely colored gems have been discovered in Nigeria. These
gems also owe their color to atoms of copper.
Until recently yellow tourmaline had been missing from the
vast rainbow of tourmaline colors. Brown
tourmaline that approached yellow had been available for many years... but not
Pure yellow tourmaline was discovered just a few
short years ago.
The place was Malawi in East Africa. The year was 2000.
Green tourmaline is a pleasing and popular gem stone, and has been for
Red and pink tourmaline are also very popular. Pinks
can be pastel or vivid, as seen here.
tourmaline that looks red under all lighting conditions is also known as
rubellite (thought to come from the phrase ruby-like).
Red tourmaline that looks pink under incandescent light is
technically known as... pink tourmaline.
Blue tourmaline is gaining in popularity. Recent
discoveries are bringing gems of good color to market at very affordable prices.
Indicolite is another name applied to blue tourmaline,
usually to the darker shades.
Black tourmaline is opaque and is often used as an
upscale replacement for faceted onyx.
Watermelon tourmaline (red center with green outer
portion) and other bi-colored and tri-colored tourmalines are often used in
designer jewelry pieces.
To the gemstone trade tourmaline is known as a beautiful
and diverse gem. In the gemology and mineralogy worlds it is known as a group of
minerals with similar chemical composition.
Or to quote a friend... "tourmalines form in crystals of complex aluminum-borosilicates, varying in their
Whatever your favorite color, there's very likely a
tourmaline gem to please you.
TanzaniteOne, the company that acquired the interests in
the tanzanite mines formerly run by African Gem Resources Ltd. (AFGEM), began
trading on the London Stock Exchange's Alternative Investment Market (AIM) in
Zambian Miners Score in Tucson
Eight Zambian companies — sponsored by the Mining Sector
Diversification Programme (MSDP) — that attended the Tucson gem shows have
reported significant sales and interest from buyers.
Editors note: - We met
these Zambian miners and dealers at the Tucson Shows last February, and
mentioned them in our February 2004
Although their exhibit space was
located in an area attracting less traffic than the main halls, they were doing
a very respectable amount of business.
We enjoyed meeting and talking
The holidays are coming!
Are you making up new pieces of jewelry to rebuild and
upgrade your inventory? Now is a good time to work at
this fun and vital task.
We have hundreds of gems in a wide range of gem species,
colors, and sizes.
Most of our stock is in sizes suitable for rings,
pendants, and earrings.
Send me an email for information on gems that interest
Do you enjoy jewelry and gems?
Do you enjoy talking with friends and co-workers?
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The Dorado Company
P.O. Box 8232
Scottsdale, AZ 85252-8232