Alexandrite

Generally stable to light, heat & chemicals. Do not boil. Sonic OK, ultrasonic with care (jewelers only).

Amber

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

Amethyst

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

Andalusite

Ultrasonic OK. Do not boil.

Apatite

Heat & strong light can cause color to change or fade. Do not boil. No ultrasonic.

Aquamarine (Beryl)

Do not boil. Ultrasonic with caution: jewelers should check for inclusions. Sonic OK. Acids can cause damage, especially hydrofluoric. Soak in ammonia, brush. Brush accent gems & Water-Pik with warm, soapy water.

Beryl

Generally stable. Avoid boiling and ultrasonic; sonic cleaning is OK.

Cat’s Eye (Chrysoberyl)

Strong heat (jewelers torch) may destroy color. Boiling and ultrasonic cleaning best done carefully, by jeweler. Soak in ammonia, brush, Water-Pik.

Citrine (Quartz)

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

Coral

Organic material, soft & often dyed. Do not boil, ultrasonic or use chemicals. Clean with soapy water. Brush accent stones & clean with Water-Pik.

Diamond

Untreated diamonds OK to boil & ultra- sonic. Soak in ammonia, brush & Water-Pik. Fracture-filled diamonds must be treated with care. Jeweler’s torch can remove fillings—let him know if you know your diamond is filled!

Diopside

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

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 & Water-Pik with warm, soapy water.

Garnet

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

Iolite

Gentle boiling & ultrasonic OK. Avoid thermal shock. Acids can damage. Soak in ammonia, brush, Water-Pik.

Jade (Jadeite & Nephrite)

Often polished with wax finish. Other- wise, very tough. Avoid high heat, solvents, acids & strong light. Soak briefly in ammonia, brush & Water-Pik.

Kunzite (Spodumene)

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

Lapis Lazuli

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

Malachite

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

Opal

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

Pearls

Organic; avoid chemicals, hair spray, perfume, perspiration. Very soft. Do not boil or ultrasonic. Wipe with soft, damp cloth after wearing. Do not store in safe deposit box for long periods. Need light.

Peridot

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

Quartz

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

Ruby & Sapphire (Corundum)

Boiling and ultrasonic generally safe. Soak in ammonia & brush. Water-Pik with hot, soapy water. May have glass-filled cavities that could be dislodged.

Spinel

Boiling OK; avoid heat shock. Sonic cleaning OK; ultrasonic with care. Jewelers’torch may fade light colors. Soak, brush & Water-Pik.Do not boil or ultrasonic. Will fracture if shocked. Damaged by hydrofluoric & hydrochloric acids. Soak in ammonia & brush, Water-Pik accent stones.

Tanzanite (Zoisite)

Do not boil or ultrasonic. Fractures if shocked. Soak in ammonia & brush; clean accent stones with Water-Pik.

Topaz

Do not boil or ultrasonic. Fractures if shocked. Soak in ammonia & brush; clean accent stones with Water-Pik.

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 & dry.

Zircon

Do not boil; ultrasonic OK. High heat or strong light could change color. Easily abraded—handle with care. Soak in ammonia, brush & Water-Pik.

Note:

If in doubt, let the appraiser clean your jewelry. Remember that cleaning might loosen stones—check carefully.


American Society of Appraisers
accredited gemologists association

Business Hours

DayFromTo
Monday09:00 AM05:30 PM
Tuesday09:00 AM05:30 PM
Wednesday09:00 AM05:30 PM
Thursday09:00 AM05:30 PM
Friday09:00 AM05:30 PM
Saturday09:00 AM12:30 PM
Sunday Closed

Office Location

1000 Farmington Avenue, Suite 108

West Hartford, CT 06107