Which of the following is not a precious/semi-precious stone?

Which of the following is not a precious/semi-precious stone? Correct Answer Pearl

A pearl is a hard object produced within the soft tissue (specifically the mantle) of a living shelled mollusk. Just like the shell of a clam, a pearl is made up of calcium carbonate in minute crystalline form, which has been deposited in concentric layers. The ideal pearl is perfectly round and smooth, but many other shapes of pearls (baroque pearls) occur. The finest quality natural pearls have been highly valued as gemstones and objects of beauty for many centuries, and because of this, the word pearl has become a metaphor for something very rare, fine, admirable, and valuable.
Bissoy MCQ

Related Questions

H উচ্চতায় অবস্থিত একটি বেলুন থেকে একটি পাথর ছেড়ে দিলে তা । উচ্চতায় অবস্থিত একটি হেলানো তনের উপর আছড়ে পড়ে। হেলানো শুলকে আঘাতের পর পাথরটির বেগ আনুভূমিক হয়। h/H এর মান কত হলে পাথরটি ভূমিকে স্পর্শ করতে সর্বোচ্চ সময় নিবে? (A stone falls from a balloon at a height of H above the ground and hits an inclined plane in its path at a height of h. After impact, the velocity of the stone becomes horizontal. What should be the value of hill so that the stone will take maximum time to reach the ground?)
'If' a stone 'thrown' into a pond, the ripples will spread out 'from' the point 'where' the stone
A rolling stone gathers no mass. Here rolling stone is-
Hey many years elapsed between the date of the oldest hieroglyphics deciphered by means of the Rosetta stone and the stone's discovery?
A man standing on a edge of a cliff throws a stone vertically upwards with a certain speed. He then throws another stone downwards with the same speed. Find the ratio of the speeds of the two stones when they hit the ground.
The building is built of stone. Here 'stone' is a/an -
Which of the following languages was not written on the Rosetta stone'?
Which of the following places is not a Middle Stone Age?
Which amidst the following is not a gem stone ?
Which one is not the cause of kidney stone formation?