Colour Gem imitated (ct) 1 Green Emerald 5.35 2 Green Emerald 3.86 3 Blue-green Paraiba tourmaline 1.71 4 Blue-green Paraiba tourmaline 3.36 5 Red Rubellite 4.45 6 Orange Spessartine
4.71 7 Violet Tanzanite 4.49 8 Yellow-green Peridot 8.83 9 Light blue Aquamarine 7.54 10 Light blue Topaz 8.64 11 Orangey pink Morganite 8.21 12 Violet Amethyst 8.66 13 Violet and yellow Ametrine 8.30 14 Red and green Bicoloured tourmaline 8.37 15 Milky green Prehnite 8.48 16 Colourless with Gold-in-quartz 13.79 'golden' inclusions 17 Colourless with Rutilated or 2.29 narrow foil strips tourmalinated quartz 18 Various iridescent Girasol 4.28 Internal features Crown/ In crown and No.
As indicated by the data in Table II, the stone consists of almandine with a spessartine
component rather than a pyrope component.
Only a small lot of bizarre, though good-quality, little spessartine
crystals was available for sale.
Based on type garnet market is classified into almandine, andradite, grossular, pyrope, spessartine
, and uvarovite.
In a second talk, Dr Krzemnicki described items studied recently in SSEF's laboratory, such as sapphires from basaltic deposits in Nigeria, low-temperature heated rubies from Mozambique, heated red spinels from Tanzania, a hydrothermal synthetic emerald weighing 67 ct, a star spessartine
from Nigeria, and the effect of chemical alteration on conch pearls.
Another impressive specimen was a 130-kg block of albite on which rested a 24 X 60-cm crystal of smoky quartz from the Navegadora mine, Conselheiro Pena, Minas Gerais, Brazil--a locality well known for its fine spessartine
Especially since World War II, the pegmatites of the state of Minas Gerais have yielded some of the world's finest specimens of topaz, chrysoberyl, euclase, elbaite, and beryl (in all of its colored varieties); phosphate-rich pegmatites of the same state have furnished the world's finest specimens of brazilianite, beryllonite, eosphorite, hydroxylherderite, amblygonite and more; complex pegmatites of other kinds have provided cassiterite, xenotime, monazite and several rare-earth species; Brazilian specimens of titanite, phenakite, fluorapatite, kyanite, scheelite, spessartine
and bertrandite are among the world's very best.
In the older classifications they were considered typical sodalithic pegmatites, with characteristic dominance of albite over microcline, lepidolite over other micas, spessartine
over almandine and elbaite over schorl.
The beautiful gemmy orange spessartine
crystals from the Loliando area are quite widespread around the market (including matrix specimens).
Most recently, remarkable, partially gemmy, trapezohedral spessartine
crystals of a bright mandarin-orange color, up to the size of baseballs, have been found about 35 km northeast of Loliondo, close to the Kenya border.
Auguste) and "Grossular from Mali" (Bill Dameron); following "Classic Garnets: Spessartine
" (six authors) we find "Spessartine
from Tongbei" (Bert Ottens).
on Quartz Shigar Valley, Skardu, Pakistan 33/4" tall pictured Ikons, Classic and Contemporary Masterpieces, pg.