Essential core:

Quality criteria: A rich, deep blue-violet with no noticeable gray or brown undertones is essential. High transparency, without structural weaknesses, is crucial. Larger carat weights are rare. Cutting requires exceptional precision, as both cleavage and pronounced pleochroism must be taken into account.

Market position: Tanzanite has only one commercially relevant deposit region worldwide: the Merelani Hills in Tanzania. This geologically unique occurrence results in structurally limited supply alongside stable international demand.

Geological characteristics: Tanzanite was discovered in the Merelani Mountains in 1967 and, to date, has only been found there. Its blue-violet color is caused by vanadium in the crystal lattice.

A defining feature is its pronounced pleochroism: depending on the viewing angle, the stone can appear blue, violet, or slightly brownish. The combination of geological uniqueness, limited production, and selectively available top quality gives high-quality specimens a distinctive market position.

Depending on the viewing angle, it appears blue, violet, or purple.

Investment quality:
high proportion of deep blue-violet and clean material

Market position:
Long-term stable demand