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24mm Silicon cabochon silver drop pear naturally etched 24 by 17 by 4.7mm 16.3ct
The etching is natural and not carved.

Silicon is one of the most abundant elements in the planet but mixed with other things - not in it's true state like this. With natural wave like patterns it is stunning.

Silicon is a chemical element with symbol Si and atomic number 14. Silicon is the eighth most common element in the universe by mass, but very rarely occurs as the pure element in the Earth's crust. It is most widely distributed in dusts, sands, planetoids, and planets as various forms of silicon dioxide (silica) or silicates. Over 90% of the Earth's crust is composed of silicate minerals, making silicon the second most abundant element in the Earth's crust (about 28% by mass) after oxygen. Silicon is a semiconductor. It has a negative temperature coefficient of resistance, since the number of free charge carriers increases with temperature. It has a MOH scale hardness of 6.5,