Mohs Hardness 6 to 7
Mined From Tanzania
Typical Cutting Style Faceted
light to dark violet blue and bluish purple as well as pure blue. Rich, deep
hues are valued most, but you will usually see these in larger stones ( 5ct
upwards). Tanzanite typically shows strong pleochroism, which means it displays
different colours from different directions it usually looks violet-blue from
some directions and purplish from others.Predominately blue tanzanite is
generally worth more per carat, paler tones are more affordable.
Ca2 Al3 (SiO4)3 (OH) Calcium aluminium silicate.
Tanzanite are routinely heat treated to produce the blue purple colour.
Inclusions Tanzanite gemstones are often inclusion free. Eye visible inclusions decrease
the value of tanzanite especially in the lighter coloured stones.
Cleaning & Care Warm soapy water and a soft toothbrush will help maintain
the sparkle of your Tanzanite. Ultrasonic and steam cleaners are never recommended for tanzanite. Tanzanite is stable under normal
wearing conditions, which means it is resistant to the effects of heat, light,
and common chemicals. Even so, tanzanite should not be subjected to very high
temperatures or sudden temperature changes. It can be attacked by exposure to
hydrochloric and hydrofluoric acids. Tanzanite is a special-care gem for two reasons: sensitivity
to thermal shock and potential for cleavage. Sometimes the temperature change
from very hot to cold can be enough to develop cleavages in tanzanite. Visit us
on a yearly basis for a FREE clean and polish service.
Storing Your Tanzanite When you are not wearing your tanzanite jewellery place it
in a cloth pouch or in a separate compartment to other gemstone jewellery (i.e,
diamonds are a higher hardness level on the Mohs scale) they could cause
scratches to other items of gemstone jewellery that have a lower hardness
Interesting Facts Tanzanite is a relatively new gemstone, it was first found in 1962,
scattered on the Earths surface in northern TanzaniaTiffany and Company recognised the
stones potential as an international seller and made a deal to become its main
distributor. Tiffany named the gem after the country it came from, and promoted
it with a big publicity campaign in 1968.
Probably the most noteworthy tanzanite
gemstone is the Queen of Kilimanjaro, which is set into a white
gold tiara along with 803 garnets and 913 diamonds. It is thought to be one of
the world's largest faceted tanzanite gemstones, and weighs 242 carats.In the early 2000s the American Gem
Trade Association choose Tanzanite as a December birthstone, the first change
to their birthstone list since 1912