Precious Tanzania CoLtd / Gems Way CoLtd / Tanzania Whole Duty CoLtd

30/01/2020

Bom dia.

Learn more about Mozambican rubies.

20/12/2019

Tanzanite is one of the birthstones for December.

18/10/2019

From the 25th to the 27th of October the Gübelin Academy is attending this year's Munich Show, where we will be happy to share our knowledge about the fascinating world of coloured gemstones, specifically about the "Big Three" and gemstone inclusions. Come and join us at one of our German talks on Friday, Saturday or Sunday. Further information can be found at https://munichshow.de/?lang=en.

28/07/2019

Sail away with this 7.60 carat fancy cut pink tourmaline and diamond sailboat slide pendant set in 18K yellow gold. Where are you headed this summer? Photo: Robert Weldon/GIA. Courtesy: Leslie Weinberg Designs

04/08/2018

Can you guess the identity of the center stone in this ring? If you guessed ruby, you were wrong! It is actually red spinel, an increasingly popular alternative to ruby and one of the birthstones for August. Photo: Robert Weldon/GIA. Courtesy: Jeffery Bilgore

30/07/2018

Rubies are often associated with power and desire. Historically, Ancient Hindus believed that those who offered fine rubies to the god Krishna would be reincarnated as emperors. Learn more about the rich history and lore behind July’s birthstone. http://bit.ly/2uVwkKz Photo: Robert Weldon/GIA. Gift of William F. Larson

22/07/2018

Did you know: fine-quality rubies over one carat are very rare and price goes up significantly as size increases? Consult our buyer’s guide if you are looking to gift a ruby to someone with a July birthday. http://bit.ly/2LymHrG Courtesy: Jan Goodman Co.

17/06/2018

Poised between lush blue, vibrant violet, and rich purple, exotic tanzanite is found in only one place on earth, near majestic Mount Kilimanjaro. Learn more about this gemstone: http://bit.ly/2JT55sN Courtesy: Omi Privé

17/04/2018

A Peruvian source yields a new azurite-malachite mixture.

28/01/2018

Songea.

Space is limited, register now!

10/01/2018

Compares PL spectroscopy data of 48 emerald samples from three countries to evaluate the usefulness of the technique in geographic origin...

28/12/2017

The color of the season - this 3.32 carat ruby, named the Crimson Prince, was cut from a rough crystal that weighed 1.2 grams (6 carats). Both the color and the clarity make this stone extremely rare. Photo: Robert Weldon/GIA. Courtesy: Jeffery Bergman