gem mineral वाक्य
उदाहरण वाक्य
मोबाइल
- Gem minerals include amethyst, chrysoberyl, brazilianite, topaz and quartz.
- Diamonds are obviously not chemically bonded carbon, extracted by smelting, but gem mineral inclusions.
- There are about 20 mineral species that qualify as gem minerals, which constitute about 35 of the most common gemstones.
- Gem minerals are often present in several varieties, and so one mineral can account for several different gemstones; for example, ruby and sapphire are both corundum, Al 2 O 3.
- In following years ( 1991 94 ), INSA sponsored another project on Minerals and Metals in Pre-Modern period ( 1200-1900 AD ) which led to the publication of several interesting papers in Indian J History of Science; Gem minerals in pre-Modern India, Non-Gem Minerals in Pre-modern India and Iron and Steel in Pre-modern India.
- In following years ( 1991 94 ), INSA sponsored another project on Minerals and Metals in Pre-Modern period ( 1200-1900 AD ) which led to the publication of several interesting papers in Indian J History of Science; Gem minerals in pre-Modern India, Non-Gem Minerals in Pre-modern India and Iron and Steel in Pre-modern India.
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