Gemstones

Tanzanite

 

Tanzanite is an extraordinary gemstone. It occurs in only one place worldwide. It is named after the East African state of Tanzania, the only place in the world where it has been found. Africa? It is a continent which provides the world with a multitude of truly magnificent gemstones, like tanzanite for example.

 

On its discovery in 1967, it was enthusiastically celebrated by the specialists as the ‘gemstone of the 20th century’. They held their breath in excitement as they caught sight of the first deep-blue crystals which had been found in the Merelani Hills near Arusha in the north of Tanzania. Millions of years ago, metamorphic schists, gneisses and quartzites formed impressive, flattopped inselbergs on a vast plain in the shadow of Kilimanjaro.

 

The precious crystals grew in deposits on the inside of these unusual elevations. For a long, long time they were hidden from the eye of Man, until one day some passing Masai shepherds noticed some sparkling crystals lying in the sun and took them along with them. In Merelani today, the search is carried on for the coveted crystals in several, smallish mines, in some cases using modern methods. As a rule, only small grains are found, but now and again the mineworkers succeed in fetching out a larger crystal – to the joy of the mine owners and that of the large number of tanzanite fans.

 

Information supplied by the International Coloured Gemstone Association.

Gemstone Care Chart

 

Limited Guarantee Certificate

 

We hereby guarantee that every item of jewellery purchased from Déonne le Roux Jewellers has been manufactured according to trusted modern production methods and has been subjected to a comprehensive quality control. Should damage nevertheless take place that can be traced back to errors in material or production, we offer a one-year limited guarantee from the date of purchase. Please be informed that damage occurring as a result of normal wear and tear, accidents, mishandling or abusive use cannot be considered an error.

Deonne Le Roux Alexandrite Gemstone

Alexandrite

Generally stable to light, heat and chemicals. Do not boil. Ultrasonic with care (jewellers only).

Deonne Le Roux Gemstone Jade

Jade

(Jadeite and Nephrite) Often polished with wax finish. Otherwise, very tough. Avoid high heat, solvents, acids and strong light. Soak briefly in ammonia, brush and rinse.

Deonne Le Roux Gemstone amber

Amber

Easily damaged by heat, pressure, and chemicals. Wipe or soak in soapy water. Do not ultrasonic.

Deonne Le Roux Gemstone Kunzite

Kunzite

(Spodumene)

Do not boil or ultrasonic. Heat and strong light can change color. Soak in ammonia, rinse and brush. Avoid hydrofluoric acid.

Deonne Le Roux Gemstone Amethyst

Amethyst

Avoid strong heat and abrupt temperature changes. Boiling and ultrasonic should be done with care not to “shock” stone. Soak in ammonia and brush.

Deonne Le Roux Gemstone Lapis Lazuli

Lapis Lazuli

Do not boil or ultrasonic. Often dyed. Avoid heat, solvents, acids, strong detergents. Clean gently with soapy water.

Deonne Le Roux Gemstone Andalusite

Andalusite

Ultrasonic OK. Do not boil.

Deonne Le Roux Gemstone Malachite

Malachite

Do not boil or ultrasonic. Avoid heat, solvents, acids. Clean gently with soapy water.

Deonne Le Roux Gemstone Apatite

Apatite

Heat and strong light can cause colour to change or fade. Do not boil.

Deonne Le Roux Gemstone Opal

Opal

Very delicate and heat sensitive. Do not boil or ultrasonic. Avoid all solvents, acids, heat, abrasion. Brush with soapy water, brush accent gems.

Deonne Le Roux Gemstone Aquamarine

Aquamarine

(Beryl)
Ultrasonic with caution: jewellers should check for inclusions. Acids can cause damage, especially hydrofluoric. Soak in ammonia, brush. Brush accent gems and rinse with warm, soapy water.

Deonne Le Roux Gemstone Pearl

Pearls

Organic: avoid chemicals, hairspray, perfume, perspiration. Very soft. Do not boil or ultrasonic. Wipe with soft, damp cloth after wearing. Do not store in a dark place. Needs light.

Deonne Le Roux Gemstone Beryl

Beryl

Ultrasonic with caution: jewellers should check for inclusions. Acids can cause damage, especially hydrofluoric. Soak in ammonia, brush. Brush accent gems and rinse with warm, soapy water.

Deonne Le Roux Gemstone Peridot

Peridot

May fracture if heat-shocked. Do not ultrasonic. Boil with care. Damaged by acids. Soak in ammonia and brush clean.

Deonne Le Roux Gemstone Cat's Eye

Cat’s Eye

(Chrysoberyl)
Generally stable. Avoid boiling and ultrasonic.

Deonne Le Roux Gemstone Quartz

Quartz

Avoid strong heat and abrupt temperature changes. Boiling and ultrasonic should be done with care not to “shock” stone. Soak in ammonia and brush.

Deonne Le Roux Gemstone Citrine

Citrine

(Quartz)
Strong heat (jewellers torch) may destroy color. Boiling and ultrasonic cleaning is best done carefully, by jeweller. Soak in ammonia, brush, rinse.

Deonne Le Roux Gemstone ruby

Ruby

(Corundum)
Boiling and ultrasonic generally safe. Soak in ammonia and brush. Rinse with hot, soapy water. May have glass-filled cavities that could be dislodged.

Deonne Le Roux Gemstone Coral

Coral

Organic material, soft and often dyed. Do not boil, ultrasonic or use chemicals. Clean with soapy water. Brush accent stones and clean with rinse.

Deonne Le Roux Gemstone spinel

Spinel

Boiling OK: avoid heat shock. Sonic cleaning OK: ultrasonic with care. Jewellers’ torch may fade light colors. Soak, brush and rinse.

Deonne Le Roux Gemstone diamond

Diamond

Untreated diamonds OK to boil and ultrasonic. Soak in ammonia, brush and rinse. Fracture-filled diamonds must be treated with care. Jeweller’s torch can remove fillings—let him know if you know your diamond is filled!

Deonne Le Roux Gemstone Tanzanite

Tanzanite

(Zoisite)
Do not boil or ultrasonic. Will fracture if shocked. Damaged by hydrofluoric and hydrochloric acids. Soak in ammonia and brush. Rinse accent stones.

Deonne Le Roux Gemstone diopside

Diopside

Do not boil or ultrasonic: do not expose to hydrofluoric acid. Very heat-sensitive. Soak in ammonia, brush.

Deonne Le Roux Gemstone Topaz

Topaz

Do not boil or ultrasonic. Fractures if shocked. Soak in ammonia and brush. Clean accent stones with rinse.

Deonne Le Roux Gemstone Emerald

Emerald

(Beryl)
Use extreme care. Usually filled with oil or resins that might be removed with cleaning. (Fillings can be restored.) Do not boil or ultrasonic. Rinse, brush and rinse with warm, soapy water.

Deonne Le Roux Gemstone Turquoise

Turquoise

Do not boil or ultrasonic. Attacked by acids. Cosmetics or perspiration may discolor stone. Many are dyed or “stabilized” with resins. Brush with ammonia, rinse and dry.

Deonne Le Roux Gemstone Garnet

Garnet

Gentle boiling OK if temperature “shock” avoided. Ultrasonic with care. Sonic OK. Jewellers avoid hydrofluoric acid and torch. Soak in ammonia, brush.

Deonne Le Roux Gemstone Iolite

Iolite

Gentle boiling and ultrasonic OK. Avoid thermal shock. Acids can damage. Soak in ammonia, brush and rinse.

Deonne Le Roux Gemstone Zircon

Zircon

Do not boil: ultrasonic OK. High heat or strong light could change colour. Easily abraded—handle with care. Soak in ammonia, brush and rinse.