Turquoise of the Southwest

What do you think of when you hear the word turquoise? Most of us think of the Southwest,where turquoise has been a part of Native American tradition for thousands of years.

Turquoise has been minded in many places throughout the world. Clear blue Persian turquoise it thought by many to be among the finest turquoise. Mines in India produce green turquoise. Chinese mines are currently selling a great deal of turquoise in varying colors to the jewelry industry. Mines in the southwestern US, many family owned, yield turquoise in a variety of colors and qualities.

Turquoise forms when water percolates through rocks that contain copper, aluminum and other minerals. A chemical reaction takes place that results in deposits of what we know as turquoise. That's a simplified way of describing a process that takes millions of years and only happens when a complex set of conditions come together.

Many ask why turquoise is different colors? The blue in turquoise is enhanced when copper is present. If the area where turquoise is formed contains more aluminum, the turquoise will shade to green. When zinc is present, the deposits are a yellow-green color, a rare combination that so far has been found in only a few areas, including the Carico Lake and Blue Ridges mine in Nevada.

The dark markings in turquoise is what they call matrix, the rock that the turquoise formed in. When stones are cut, some of the matrix remains bound to the turquoise Matrix color varies because turquoise can form in different types of rock
**black matrix may be iron pyrite
** yellow matrix could be rhyolite
** brown is probably iron oxide
** The term spider webbing refers to stones with thin lines of matrix distributed throughout them.

Hardness of turquoise used for jewelry usually varies from 5-6 on the Mohs scale. The hardest turquoise is usually found nearest the surface of the earth, where it's had a chance to dry,or cure. Softer turquoise is chalk like---too soft and porous to be used unless it's treated.

Stabilized Turquoise is when an epoxy resin or other substance is infused into the pores of the turquoise. No longer porous, it's color remains the same over time. Natural turquoise develops a lovely patina as its worn and absorbs oils from our skin.
Stabilization allows designers to use poorer-quality turquoise that might otherwise not be suitable for jewelry.

Many also color treat their turquoise with chemicals to enhance or change the color to make it more appealing to the eye.

Other techniques are used to turn soft,porous turquoise into a usable product. Watch out for terms like reconstituted, which describes turquoise chips that have been mixed with resin then molded into shapes.

Most of the turquoise found in today's jewelry has been treated or enhanced in some way, and there's nothing wrong with that as long as you know it is treated and pay a suitable price for it. If jewelry designers had to rely on only high quality, natural stones, high prices would prohibit many of us from owning any turquoise at all.

Natural turquoise many have been cut and polished, but no artificial changes have been made to the gems. Color many change over time as body oils and other sources of moisture are absorbed into the stones. Only high quality turquoise can be used in it's natural state.

Handle your turquoise jewelry carefully to avoid scratching it. Don't store turquoise with harder gemstones or other material that might rub against it and cause damage.

Keep turquoise away from high heat and chemicals such as oils,perfumes, and household cleaners. Even stabilize turquoise can be affected by a constant bombardment of chemicals.

Clean your turquoise in warm , sudsy water and dry it immediately with a soft cloth. Avoid commercial jewelry cleansers.

Any time you pay a premium price for jewelry you should be sure the person you are buying it from is reputable and knowledgeable about all aspects of the item.

We tend to become attached to our turquoise jewelry. Choose turquoise because it speaks to you, not because it is the current fashionable color with the currently-popular amount of matrix.

Wear it often and you'll never give it up.

Compliments of Carly Wickell !

Thanks to you all !

Gayla Self