Tanzanite in small sizes is quite easy to obtain, but as the sizes
increase so does the
gemstones
scarcity.
This has a logarithmic effect on the price, which
is not in proportion or relative to the prices of
the smaller sizes. For example, if you paid $300 for
a 1 ‘Carat’ Tanzanite you won’t be paying $300 per
‘Carat’ for a 4 ‘Carat’ Tanzanite: You’ll probably
be paying $500 per ‘Carat’ as the prices go up according
to the scarcity of the gemstone in large sizes.