Gem Info On Cabochons

Are you wondering what a Cabochon is?

They are gemstones, natural stones, cut and polished from many different ores, minerals and seashells. They’re known for their non-faceted smooth domed top and flat back. They date back to the ancient times and were not just used as decorative jewelry, but for their healing and protective powers too.

Gemstone Care Chart: A-D

Below is a chart of popular gemstones. This chart lists the Mohs hardness of the listed gemstones as well as advice on care for these gems.

Gemstones Hardness Care
Agate 6.5 to 7
Amber 2 to 2.5 protect from scratches; household chemicals, cosmetics, perfumes can damage and discolor
Ammolite 4.5 very fragile; avoid bumping and scratching
Andalusite 7 to 7.5
Benitoite 6 to 6.5 protect from blows
Beryl (Aquamarine, Green Beryl, Red Beryl, Morganite, Heliodor) 7.5
Chalcedony (Chrysocolla, Chrysoprase) 6.5 to 7
Chrysoberyl(Alexandrite, Cat’s Eye) 8.5
Coral 3.5 to 4 very soft; avoid chemicals
Diamond 10 very hard; protect from blows
Emerald 7.5 to 8 protect from blows, high temperatures, and solvents, avoid ultrasonic cleaners.
Feldspar (Moonstone, Sunstone) 6 to 6.5
Garnet (Malaya, Pyrope, Rhodolite, Spessartite, Tsavorite) 6.5 to 7.5 protect from sharp blows
Iolite 7 to 7.5
Jadeite 6.5 to 7 may be waxed, avoid chemical cleaners
Kunzite 6.5 to 7 color can fade with wear; avoid sharp blows; protective setting is recomended
Lapis Lazuli 5 to 6 protect from scratching
Malachite 3.5 to 4 very soft; protect from scratching
Opal 5 to 6.5 protect from sharp blows, heat and light, protective setting recommended-(Evening wear)
Pearl 2.5 to 4 protect from scratches; perfumes and household chemicals can wear away nacre
Peridot 6.5 to 7 protective setting recomended; can chip
Quartz (Amethyst, Ametrine, Citrine, Rock Crystal, Rose Quartz) 6.5 to 7
Ruby 9 very tough, no special care required
Sapphire 9 very tough, no special care required
Spinel 8
Sugilite 5.5 to 6.5 protect from scratching
Tanzanite 6 to 7 protective setting recommended
Topaz 8 protect from sharp blows
Turquoise 5 to 6 take care to prevent scratching; protective setting recommended, avoid chemical cleaning
Zircon 6 to 7.5 facet junctions can abrade