Question
Download Solution PDFWhich one of the following gemstones contains beryllium metal?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFThe correct answer is option 2 i.e Emerald
Explanation of some of the Gemstones are:
Topaz
- It is a rare silicate mineral with a chemical composition of Al2SiO4(F,OH)2
- It has a hardness of 8 on the Mohs Hardness scale.
- It is found where rocks like Pegmatite and Rhyolite are formed.
Emerald
- They are gem-quality specimens of the beryl mineral family with a rich, distinctly green colour.
- It has a hardness of 7.5 to 8 on the Mohs Hardness scale.
- Chemical composition of Be3Al2(SiO3)6. When pure, beryl is colourless and known as "Goshenite''.
- Trace amounts of Chromium or Vanadium in the mineral cause it to develop a green colour.
- They are found in igneous, metamorphic and sedimentary rocks.
Ruby
- They are gem corundum with a dominant Red colour (due to the presence of Chromium).
- It has a hardness of 9 on the Mohs Hardness scale.
Blue sapphire
- Trace amounts of Iron and Titanium can produce a blue colour in corundum.
- Blue corundums are known as Sapphires.
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