Semi-Precious Gemstones
Tourmaline
Tanzanian tourmaline includes prized chrome green from the Umba Valley plus rubellite, indicolite and watermelon varieties. Natural, untreated stones in faceted and rough form.
Specifications
| Hardness | 7 - 7.5 (Mohs) |
|---|---|
| Origins | Umba Valley (chrome tourmaline), Mahenge, Tunduru |
| Colors | Green (chrome), pink (rubellite), blue (indicolite), watermelon, parti-colored |
| Treatments | No treatment (natural) |
| Load Port | Dar es Salaam (JNIA) |
| Target Markets | USA, Europe, India, UAE |
Harvest Seasonality
Highlighted months indicate peak harvest availability. The current month is outlined.
J
JanF
FebM
MarA
AprM
MayJ
JunJ
JulA
AugS
SepO
OctN
NovD
Dec