See Gem As
Tools
Research
What Have Diamond Ages Taught Us?
Diamond ages offer insight into continent evolution spanning billions of years.
A History of European Royal Jewel Sales, Including Sotheby’s 2018 Auction of Marie Antoinette’s Jewels
Chronicles important auctions of jewels from European royal collections over the years, with a focus on a recent high-profile sale of items that once belonged to Marie Antoinette.
Raman and photoluminescence mapping of gem materials
Eaton-Magaña S., Breeding C.M., Palke A.C., Homkrajae A., Sun Z.Y., McElhenny G. (2021) Raman and photoluminescence mapping of gem materials. Minerals, Vol. 11, No. 2, Art. 177.
The new mineral crowningshieldite: A high-temperature NiS polymorph found in a type IIa diamond from the Letseng mine, Lesotho.
Smith E.M., Nestola F., Pasqualetto L., Zorzi F., Seccon L., Wang W. (2021) The new mineral crowningshieldite: A high-temperature NiS polymorph found in a type IIa diamond from the Letseng mine, Lesotho. American Mineralogist, Vol. 106, No. 2, pp. 301-309.
Heavy iron in large gem diamonds traces deep subduction of serpentinized ocean floor
Smith E.M., Ni P., Shirey S.B., Richardson S.H., Wang W., Shahar A. (2021) Heavy iron in large gem diamonds traces deep subduction of serpentinized ocean floor. Science Advances, Vol. 7, eabe 9773
Nitrogen in diamond
Ashfold M.N.R., Goss J.P., Green B.L., May P.W., Newton M.E., Peaker C.V. (2020) Nitrogen in diamond. Chemical Reviews, Vol. 120, No. 12, pp. 5745-6794.
Decoration of growth sector boundaries with nitrogen vacancy centers in as-grown single-crystal high-pressure high-temperature synthetic diamond
Diggle P.L., D’Haenens-Johansson U.F.S., Green B.L., Welbourn C.M., Thi T.N.T., Katrusha A., Wang W., Newton M.E. (2020) Decoration of growth sector boundaries with nitrogen vacancy centers in as-grown single-crystal high-pressure high-temperature synthetic diamond. Physical Review Materials. Vol. 4, No. 9, Article 093402.
Spatial distribution of defects in natural type IIb diamond after irradiation and annealing
Eaton-Magaña S., Ardon T. (2020) Spatial distribution of defects in natural type IIb diamond after irradiation and annealing. Diamond and Related Materials. Vol. 109, Article 108034.
Natural color D-to-Z diamonds: A crystal clear perspective
Eaton-Magaña S., Ardon T., Breeding C.M., Shigley J.E. (2020) Natural color D-to-Z diamonds: A crystal clear perspective. Gems & Gemology, Vol. 56, No. 3, pp. 318-335.
Separation of Natural from Laboratory-Grown Diamond Using Time-Gated Luminescence Imaging
Researchers from De Beers Group Technology present a technique that expands on the surface luminescence used in the DiamondView instrument to provide additional imaging information and quickly distinguish colorless or near-colorless natural diamond from laboratory-grown diamond.
Novel configurations of VN4 and VN4H defects in diamond platelets: Structure, energetics and vibrational properties
Gu T.T., Ritterbex S., Tsuchiya T., Wang W. (2020) Novel configurations of VN4 and VN4H defects in diamond platelets: Structure, energetics and vibrational properties. Diamond and Related Materials, Vol. 108, Article 107957.
Deep carbon through time: Earth’s diamond record and its implications for carbon cycling and fluid speciation in the mantle
Howell D., Stachel T., Stern R.A., Pearson D.G., Nestola F., Hardman M.F., Harris J.W., Jaques A.L., Shirey S.B., Cartigny P., Smith K.V., Aulbach S., Brenker F.E., Jacob D.E., Thomassot E., Walter M.J., Navon O. (2020) Deep carbon through time: Earth’s diamond record and its implications for carbon cycling and fluid speciation in the mantle. Geochimica et Cosmochimca Acta, Vol. 275, pp. 99-122.
