Rujukan Tanzanit

  1. ↑ King, Hobart M. "Tanzanite". Geology.com. Dicapai pada 3 December 2018. The blue color of tanzanite is caused by small amounts of vanadium within the zoisite mineral structure.
  2. ↑ Briggs, Philip; McIntyre, Chris (2013). Tanzania Safari Guide: With Kilimanjaro, Zanzibar and the Coast. Bradt Travel Guides. m/s. 104. ISBN 978-1-84162-462-4.
  3. ↑ "Introduction to tanzanite". tanzanitefoundation.com. 22 June 2017.