As was already noted, the negative sign of MCD signal in the spectral interval between 370 nm and 550 nm and the observed shapes of spectral dependencies at temperatures between 150 K and 8K (MCD peak locations near 445 and 400 nm) are characteristic of bismuth-substituted iron
garnets in which the iron sites within the tetrahedral sublattice are diluted heavily with [Ga.sup.3+] ions.
Rutile contents were the highest in the hematite fraction (1), the lowest in the
garnets fraction (3) and high in the separation residue zircon (5).
(1993) The causes of color in
garnets. The Mineralogical Record, 24, 63.
The gold, enamel and
garnet bodice brooch made in 1830 sold for pounds 11,400 at Bonhams auctioneers in London's Knightsbridge - 14 times its pre-sale estimate.
Gasparik, "Comparative compressibilities of majorite-type
garnets," Physics & Chemistry of Minerals, vol.
A proposed new classification for gem-quality
garnets. Gems & Gemology, 21(4), 205-218, http://dx.doi.org/ 10.5741/gems.21.4.205.
New York, NY, July 24, 2015 --(PR.com)--
Garnets are precious stones consisting of deep red vitreous silicate minerals and are used for various commercial and industrial purposes.
In order to catch these breath taking gemstones, new launches and new eye pleasing gemstones, including the Natural Blue topaz, the Umbalite rhodolite
garnets and the Deep blue Swiss blue topaz's, please visit them at the following booth numbers:
Diorella ring in yellow gold with amethyst, Diamonds, and spessartite
garnets, CHRISTIAN DIOR.