{"id":3208,"date":"2018-09-04T14:08:24","date_gmt":"2018-09-04T14:08:24","guid":{"rendered":"https:\/\/www.istitutogemmologico.com\/?p=3208"},"modified":"2018-09-13T09:03:08","modified_gmt":"2018-09-13T09:03:08","slug":"grandidierite-gemstone-a-gemology-rarity","status":"publish","type":"post","link":"https:\/\/www.istitutogemmologico.com\/en\/gemstones-book\/grandidierite-gemstone-a-gemology-rarity\/","title":{"rendered":"Grandidierite Gemstone: a Gemology rarity"},"content":{"rendered":"

The very rare Grandidierite Gemstone<\/h2>\n

As a good naturalist, Alfred Grandidier (1836-1912) was a lover of colors. He was recognized by everyone as the foremost authority in the field of natural history of Madagascar.
\nHis two favorite colors were green and blue. This was what prompted the true discoverer of the Grandidierite, the mineralogist Alfred Lacroix, to name this Gemstone after Alfred Grandidier.<\/p>\n

In fact, Grandidierite presents itself to the world with these two typical colors, after a tortuous journey in the depths of the earth. Sometimes the blue is the dominant color with a green background, other times the green is the dominant color component, accompanied by a magical blue.<\/p>\n

Grandidierite crystallizes in the orthorhombic system, such as Peridot and Tanzanite<\/a>, but it has a hardness superior to these two Gems. Because of the high hardness, it can be mounted on rings and necklaces, thus making these Jewels unique.<\/p>\n

The Specific Gravity of the very rare not included Crystals is 3.01. Since it crystallizes in the orthorhombic crystal system, it is consequently trichroic. The three colors shown by the specimens that the Gemological Institute of Genoa has been lucky enough to analyze are: Colorless, Blue and greenish-Blue.<\/p>\n

Quality Gem Grandidierite is extremely rare. Facetable material above one millimeter in size appeared only in Madagascar and Sri Lanka. In Sri Lanka, a sample without any inclusion weighing 0.29 carats also appeared.<\/p>\n

The World Premiere of the Grandidierite video!<\/h2>\n

On our Youtube channel Gemological Institute of Genoa you can see the Grandidierite specimen inner. The Gem is transparent and weighs more than one and a half carat, a very rare weight for this Precious Stone. Also clicking play in the video below, you can see this beautiful Gemstone from Madagascar.
\n