International: General Grossular Information : Chemical Formula: Ca3Al2(SiO4)3 : Composition: Molecular Weight = 450.45 gm Calcium 26.69 % Ca 37.35 % CaO: Aluminum 11.98 % Al 22.64 % Al 2 O 3: Silicon 18.71 % Si 40.02 % SiO 2: Oxygen 42.62 % O: 100.00 % 100.00 % = TOTAL OXIDE $4.05 shipping. Tsavorite is a relatively recent gemstone type, and having been marketed well, created a new gemstone sensation and very good substitute for Emerald. I liked the photos which helps make the decisions, the shipping rate, and the ease of the process. There are also some mixed members, such as rhodolite garnet, which is a mixture of pyrope and almandite by composition. The software behind the GemSelect experience is very user friendly! The garnet family is large and varied, with members ranging from the common red almandite to the rare green tsavorite and demantoid. Scratch the stone with steel or quartz. Grossular Garnet GG0075 : 2.16ct Golden Yellow Grossular Garnet $ 116 $ 99 SALE. In hues as diverse as an amazing sunrise, to the verdant and lush greens of renewal and growth, it is a gemstone of abundance and prosperity, heartening service and gratitude to others. Mineral Family: Garnet Group ChemicalComposition: Ca 3 Al 2 (SiO 4) 3 Cleavage: Indistinct Color: Grossular Garnet can appear in all colors, but is most famous for its green hues. The name Grossular comes from the Latin Grossulara (the name of gooseberry fruit) which is the same color as the greenish variety of garnet. Grossular Garnet Properties. Since the 1960s a transparent, green grossular garnet, named tsavorite, has been mined in Kenya. Garnet's good hardness combined with its absence of cleavage makes it a very durable stone, suitable for all kinds of jewelry. Hessonite garnet. Grossular is a calcium-aluminium species of the garnet group of minerals.It has the chemical formula of Ca 3 Al 2 (SiO 4) 3 but the calcium may, in part, be replaced by ferrous iron and the aluminium by ferric iron. Was: $83.99. The name comes from the Ancient Greek: ἣσσων (hēssōn), meaning inferior; an allusion to its lower hardness and lower density than most other garnet species varieties. Why Would You Use Grossular Garnet? It has emerged in the last few years with a bright pastel mint green color. The name comes from the Ancient Greek: ἣσσων (hēssōn), meaning inferior;[4] an allusion to its lower hardness and lower density than most other garnet species varieties.[1]. Most grossular garnet contains traces of andradite or other garnet … Kenya, Tanzania and South Africa. The most normally encountered minerals in the garnet institution consist of almandine, pyrope, spessartine, andradite, grossular, and uvarovite. Within this group, Merelani Mint garnet is a grossular variety that is found in the Merelani Hills of Tanzania. Although garnets can make beautiful jewelry stones, grossulars straddle the hardness range of 6.5 to 7.5. Because the chemical composition of garnet varies, the atomic bonds in some species are stronger than in others. Hessonite occurs in medium to dark tones of yellowish-orange to reddish-orange while ... -Hardness: 7-7.5-Toughness: Fair to good-Chemical Composition: Ca 3 Al 2 (SiO 4) 3 Varieties of Grossular Garnets … The grossular group includes the light to medium green grossularite; the cinnamon-colored hessonite; the colorless leuco garnet; a dense opaque green garnet called hydrogrossular; and the rare and valuable deep green tsavorite garnet, colored by chromium. Appearance. Deposits of grossularite are found in a number of locations, including Canada (Quebec), the USA (Vermont), Africa (South Africa, Tanzania, Kenya and Mali), Russia, Pakistan and Sri Lanka. Pakistan massive grossular has a refractive index N = 1.738-1.742 and a specific gravity (SG) of 3.63, with a Cr absorption spectrum. The orange to orange-brown color is called hessonite (essonite). Grossular Garnet (Grossularite) is a green variety of Garnet that originated in Siberia, named after the botanical word for gooseberry, “grossularia”, as the gem resembled this fruit. Color range of grossular graphically displayed at the National Museum of Natural History Washington, D.C. Group of Grossular crystals, largest 1.1 cm, from Asbestos, Quebec, The System of Mineralogy of James Dwight Dana. It has two well known varieties, namely hessonite and tsavorite. found in colorless form, Single refractive, often anomalous double refractive, near colorless to light green – inert to weak orange in longwave and weak yellow-orange in shortwave; yellow – inert to weak orange in longwave and shortwave, Hessonite sometimes shows bands at 407 and 430nm, translucent to opaque pink grossularite crystals in, This page was last edited on 24 December 2020, at 06:17. A highly sought after variety of gem garnet is the fine green Grossular garnet from Kenya and Tanzania called tsavorite. It has a high refractive index (1.734-1.759) and thus excellent brilliance. Most grossular garnet contains traces of andradite or other garnet … $89.99. Grossularite (or grossular) garnet is a calcium-aluminum garnet. Hessonite comes chiefly from Sri Lanka and India, where it is found generally in placer deposits, though its occurrence in its native matrix is not unknown. Vermont State Gemstone or Gem Grossular garnet Ca3Al2(SiO4)3 Adopted in 1991. Hardness: 7 to 7.5 Hardness: Numerical Vibration: Number 6: Chemical Composition: Ca3Al2(SiO4)3, Calcium Aluminum Silicate: COMMON CONDITIONS: Physical: Arthritis, Bone Marrow, Detoxifying, Fertility, Immune System Strengthening and Support, Rheumatism: Emotional: Emotional Balance, Relationships: GRADE DESCRIPTIONS: Extra Grade: It can be colourless (when pure), white, yellow, brown, red, or green. This is because of its light color that looks very similar to the color of berries. Got one to sell? Grossular Garnets have one of the widest color ranges of any species of Garnet, from near-colorless to yellows, oranges, greens and browns. Golden Yellow Grossular Mali Garnet VVS. The name grossular is derived from the botanical name for the gooseberry, grossularia. A gemmy, more or less orange (due to small iron content) variety of Grossular garnet. 7.0 - 7.5 on the Mohs scale. Tsavorite garnet is still found in only one geographic location in the world; on the border between Kenya and Tanzania. Its name is derived from the latin word for gooseberries, because of the light-green similarity of colors to the berries. Thus, some specimens may resist scratching from household dust while others won’t. They may be found as man or woman crystals, stream-worn pebbles, granular aggregates, and massive occurrences. Grossular is the calcium aluminum garnet and forms in contact or regional metamorphic environments as does andradite the calcium iron garnet. Conduct a hardness test. 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