Question

Select the name of the rock useful for making jewellery.
A. Shale
B. Pumice
C. Obsidian
D. Granite

Answer 1

Hint:
Platinum, Gold and silver are the popular metals for making jewellery. These are highly lustrous metals which are resistant to corrosion. Also, these are highly malleable and ductile so can be transformed into any shape or design. Similarly, some rocks are used to make jewellery.

Complete solution:
Granite is the light-coloured igneous rock. It consists mainly of quartz and feldspar with a little amount of mica, amphiboles and some other minerals. Granite is popular as the world's toughest substance and it is useful in jewellery making. Also, few granites are rare and extremely beautiful. They are used as the gemstones. Example of granite- a blue tint is found in the Himalayas etc.

Additional Information:
Granite, limestone, sandstone and marbles are the type of rocks. Rocks are useful similar to metals like iron, copper and aluminium. These are used for making utensils. Precious metals gold, platinum etc are used for making jewellery. Moreover, carnelian rock is also applicable inside the jewellery.
The healing properties of crystals and minerals are being utilized for many years. Actually, gemstones are merely highly attractive as well as pricey variants of the minerals. For example, the precious sapphire is consisting of the mineral corundum. Both are used in the jewellery, but since sapphire is more spectacular, it is considered as a gem.

Hence, the correct answer is option D.

Note:
Fluorite is popular as the “Genius Stone” as well as the “most colourful mineral in the world.” These are loved by mineralogists and metaphysical healers, fluorite is their favorite for jewelry and spirituality.