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This lists of mines in India is subsidiary to the list of mines article, and future mines in the country and is organised by the primary mineral output. For practical purposes stone, marbles and other quarries may be included in this list. In India, the underground mine to surface mine ratio is 20:80 [citation needed].
A Peruvian opal (also called blue opal) is a semi-opaque to opaque blue-green stone found in Peru, which is often cut to include the matrix in the more opaque stones. It does not display a play of color. Blue opal also comes from Oregon and Idaho in the Owyhee region, as well as from Nevada around the Virgin Valley. [17] Opal is also formed by ...
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
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 ...
HPCL-Mittal Energy Limited (HMEL) is an Indian integrated refining and petrochemical company, with operations spanning crude oil refining and petrochemical manufacturing. It is a public-private partnership between fortune 500 company, Hindustan Petroleum Corporation Limited (HPCL) and Mittal Energy Investments Pte Limited (MEIL), a part of the Lakshmi N. Mittal Group.
A New Chapter to this Industry has been added by the evolution of ONGC Petro additions Ltd. (OPaL) on 15 November 2006 which is a joint venture company of Oil and Natural Gas Corporation Limited (ONGC), Gujarat State Petroleum Corporation Ltd. (GSPCL) and GAIL India Ltd. is a grass root Mega Petrochemical complex of Global scale based on dual ...
Engineers India Limited (EIL) is an Indian public sector industrial technology, engineering consultancy and technology licensing company. [ 3 ] [ 5 ] It was set up in 1965 with the mandate of providing indigenous technology solutions across hydrocarbon projects. [ 6 ]
The Halley's Comet Opal is a very fine specimen, with few flaws or blemishes and a large green and orange 1.6 cm (0.63 in) thick color bar which goes through the opal. Formed about 20 million years ago, it is an example of a nobby, which is a natural lump-shaped opal found only at Lightning Ridge. [2] As of 2006 it was for sale at $1.2 million. [3]