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The Galaxy Opal, listed as the "World's Largest Polished Opal" in the 1992 Guinness Book of Records [72] The Rainbow Virgin, "the finest crystal opal specimen ever unearthed" [73] [74] [75] The Sea of Opal, the largest black opal in the world [76] The Fire of Australia, assumed to be "the finest uncut opal in existence" [75] [77]
The Koroit opal field is known for the very distinctive type of boulder opal that is found in its mines. In Queensland boulder opal is found within a 300 km wide belt of sedimentary rocks in the Winton Formation. Here opal is found as a kernel in small concretions. [1] The Koroit Opal field was discovered in 1897 by Lawrence Rostron.
Andamooka Opal, presented to Queen Elizabeth II, also known as the Queen's Opal; Flame Queen Opal; Galaxy Opal; Halley's Comet Opal, the world's largest uncut black opal; Olympic Australis Opal, reported to be the largest and most valuable gem opal ever found
18. Platinum. Cost: $33.02 per gram Platinum is a beautiful precious metal that is in a similar category as gold and silver. All three of these metals are frequently traded in the global markets ...
Meet the "Virgin Rainbow" – perhaps the finest and certainly the most expensive opal on record. It literally glows in the dark. In fact, as it gets darker around the opal, the opal appears ...
In February 2007, the world's rarest baseball card sold at auction for $2.3 million. If you think that's totally wild, consider the world's rarest bible, which could net you $25 to $35 million.
Biogenic silica (bSi), also referred to as opal, biogenic opal, or amorphous opaline silica, forms one of the most widespread biogenic minerals. For example, microscopic particles of silica called phytoliths can be found in grasses and other plants. Silica is an amorphous metalloid oxide formed by complex inorganic polymerization processes.
27. To'ak Chocolate. Cost: $5 per gram and up To’ak Chocolate is the rarest and most valuable in the world. The company sources its cacao from certified Ecuadorian heirloom Nacional cacao pods ...