tanzanite
Tanzanite, the December birthstone, is the name given to blue to violet zoisite. It is also known for its strong pleochroism, which means that its color changes depending on the angle from which it is viewed. Its Mohs hardness is 6-7, but it has a cleavage that makes it vulnerable to impacts from certain directions, so if you wear it as jewelry, you should be careful not to expose it to strong impacts.
Carats Gem Magazine
" Tanzanite "
Tanzanite 1.180ct loose
¥24,800
Tanzanite 2.675ct loose
¥32,800
Tanzanite 2.726ct loose
¥118,000
Lavender tanzanite 2.219ct loose
¥79,800
Bicolor tanzanite 2.304ct loose
¥59,800
Tanzanite 1.741ct loose
¥45,800
Tanzanite 1.024ct loose
¥15,800
Tanzanite 2.358ct loose
¥69,800
Tanzanite 1.680ct loose
¥29,800
Tanzanite 41.690ct loose
¥2,480,000
Bicolor tanzanite 1.250ct loose
¥19,800
Bicolor tanzanite 2.270ct loose
¥55,800
Tanzanite 1.614ct loose
¥24,800