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The Great Globe at Swanage is one of the largest stone spheres in the world and stands at Durlston Castle within Durlston Country Park, a 113-hectare (280-acre) country park and nature reserve. [1] It is constructed of Portland stone, weighs about 40 tonnes and is 3 metres (10 ft) in diameter. [2] The Great Globe with Durlston Castle in the rear
Chrysoberyl is the third-hardest frequently encountered natural gemstone and lies at 8.5 on the Mohs scale of mineral hardness, between corundum (9) and topaz (8). [ 7 ] An interesting feature of its crystals are the cyclic twins called trillings .
One significant item is a gemstone globe, collected and looted by the Iranian monarchy. For many centuries the Iranian Crown Jewels were kept in the vaults of the Imperial Treasury. However, in the early 20th century, the first Pahlavi Shah transferred ownership of the crown jewels to the state as part of a massive restructuring of the country ...
How It's Made is a documentary television series that premiered on January 6, 2001, on the Discovery Channel in Canada and Science in the United States. The program is produced in the Canadian province of Quebec by Productions MAJ, Inc. and Productions MAJ 2.
Helenite, also known as Mount St. Helens obsidian, emerald obsidianite, and ruby obsidianite, is a glass made from the fused volcanic rock dust from Mount St. Helens and marketed as a gemstone. [ 1 ] [ 2 ] Helenite was first created accidentally after the eruption of Mount St. Helens in 1980 .
Sri Lanka’s gem industry has a very long and colorful history. Sri Lanka was affectionately known as Ratna-Dweepa which means Gem Island. The name is a reflection of its natural wealth.
Glass makers were supposedly so skilled that they could fool the public into thinking that glass beads and ornaments were actually gemstones. [7] When genuine gems were utilized, the stones preferred by Roman women were amethyst, emerald, and pearl. [8] Pearls were rare and expensive and were used in Roman jewelry up until the end of the Republic.
The process by which lodestone is created has long been an open question in geology. Only a small amount of the magnetite on the Earth is found magnetized as lodestone.