Home|Add to Favorites|Add to My Toolkit
Jewel&Precious Metals|Register|Sign in|Customization

Gemstone ChartGemstone Hardness ChartGemstone Clarity ChartGemstone Cut Shape Chart
Sharing buttons for facebookSharing buttons for twitterSharing buttons for Google plus

Categories   Country/region
  

Crystal Group  Color
  

                                                                                                                    

 1/5         
Gemstone Chart
Natural AgateNatural Agate
Agate is a beautiful natural chalcedony stone, classified as a semi precious gem and has been used by people as early as the ancient Egyptians in and before 3000 BC! Agate is hard and tough enough to be incorporated into jewelry and other ornamental items.
Color: Blue, green, yellow,orange, brown, gray
Categories: semi-precious stone
Chemical Composition: SiO2
Crystal Group: Hexagonal
Refractive Index: 1.530 - 1.539
Hardness: 6.5 - 7
Density: 2.57 - 2.64
Occurrence: Scotland, U.S.A., India, England, Italy, Brazil, Uruguay, Germany, Egypt, Indonesia, and many other localities.

Natural Ametrine Natural Ametrine
Ametrine is a unique semi-precious gemstone that is a blend of citrine and amethyst.It has a warm, soft cream color that shows hints of both its lilac and honey hued parents.
Color: purple, violet, yellow
Categories: semi-precious stone
Chemical Composition: SiO2
Crystal Group: Hexagonal
Refractive Index: 1.544 - 1.553
Hardness: 7
Density: 2.66
Occurrence: Brazil, Bolivia

Natural Andradite Natural Andradite
Andradite is a Garnet, belonging to the Garnet group. It has the most powerful luster of any garnet, and this makes it a reputable gem.
Color: brown, greenish brown, yellowish green, green
Categories: semi-precious stone
Chemical Composition: Ca3Fe2(SiO4)3
Crystal Group: Cubic
Refractive Index: 3.82 ¨C 3.85
Hardness: 6.5
Density: 1.888 ¨C 1.889
Occurrence: Mexico, Korea, Namibia, Russia, Iran, South Africa

Natural Apatite Natural Apatite
Apatite displays strong fluorescence under short wave ultra-violet light. There is a particularly intense and deeply saturated, geenish-blue (aka swiss blue) variety from Madagascar known as "Neon Apatite" that is becoming quite popular in the gem trade.
Color: yellow, green, below, violet
Categories: semi-precious stone
Chemical Composition: Phosphate group
Crystal Group: Hexagonal
Refractive Index: 1.63-1.64
Hardness: 5
Density: 3.17-3.23
Occurrence: Burma, Ceylon, Madagascar, Mexico, Canada, India

Natural Axinite Natural Axinite
Axinite is considered to be a semi-precious gemstone and while limited in nature, gems of good color and size are available, however, faceted stones above 1 carat are rare. Despite being a bit brittle, Axinite¡¯s brilliance and sumptuous colors ranging from a rich clove color to a vivid blue, make it a exquisite and unique gemstone that is keenly sought after by collectors and connoisseurs alike. Currently, the most in demand colors of Axinite are the earth toned browns.
Color: Yellow, brown, violet, brownish red
Categories: semi-precious stone
Crystal Group: Triclinic
Refractive Index: 1.673 ¨C 1.693
Hardness: 6.5 - 7
Density: 3.29
Occurrence: Baja CA, USA; Tanzania

Natural Beryl Natural Beryl
Beryl is a semi-precious clear gemstone which usually comes in greens, yellows, and occasionally pinks, ands various shades thereof.
Color: Green, blue, pink, yellow, red
Categories: semi-precious stone
Chemical Composition: Be3Al2(SiO3)6
Crystal Group: Hexagonal
Refractive Index: 1.577(+-.016), 1.583 (+-.017)
Hardness: 7.5
Density: 2.67-2.745
Occurrence: Austria, Columbia, Brazil, Russia, East Africa, Australia, Madagascar, South Africa, Zimbabwe, India, Pakistan, Zambia, Nigeria, U.S.A., Afghanistan

Natural Bi Color Tourmaline Natural Bi Color Tourmaline
Bi color tourmaline is the name given to tourmaline which displays more than one color in the same cystal.It is classified as a semi-precious stone.
Color: Green, red, yellow, orange. Brown, green, pink
Categories: semi-precious stone
Chemical Composition: (NaCa)(LI,MgFe,Al)9B3Si6(O,OH)31
Crystal Group: Hexagonal
Refractive Index: 1.624(+.005, -.005) - 1.644(+.006, -.006)
Hardness: 7-7.5
Density: 3.06 (.05, +.15)
Occurrence: East Africa, Brazil, USA, Afghanistan, Nigeria, Madagascar

Natural Brazilianite Natural Brazilianite
Brazilianite is a wonderful gemstone that is rare and hard to find. The main production area is in the Minas Gerais region of Brazil.
Color: yellow, greenish yellow
Categories: semi-precious stone
Chemical Composition: A hydrous sodium aluminum phosph
Crystal Group: Monoclinic
Refractive Index: 1.603 - 1.623
Hardness: 5.5
Density: 2.940 - 2.998
Occurrence: Minas Gerais, Brazil; New Hampshire, U.S.A.

 1/5          

Related Link:    Gold Coins Chart  Gold Bars Chart  Diamond Size Chart  Necklace Size Chart  Ring Size Chart  Ear Gauge Size Chart

Top Use:    Gemstone Chart     Categories:semi-precious

Recent user inquiry: