How big were the Ten Commandments stone tablets?

1 At that time the Lord said to me, “Chisel out two stone tablets like the first ones and come up to me on the mountain. Also make a wooden ark. 2 I will write on the tablets the words that were on the first tablets, which you broke. Then you are to put them in the ark.”

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Bezalel made the ark of acacia wood--two and a half cubits long, a cubit and a half wide, and a cubit and a half high.

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According to the Talmud, each Tablet was square, six Tefachim (approximately 50 centimeters, 20 inches) wide and high, and more a thicker block than a tablet, at three Tefachim (25 centimeters, 10 inches) thick

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According to traditional teachings of Judaism in the Talmud, they were made of blue sapphire stone as a symbolic reminder of the sky, the heavens, and ultimately of God's throne. Many Torah scholars, however, have opined that the biblical sapir was, in fact, lapis lazuli (see Exodus 24:10, lapis lazuli is a possible alternate rendering of "sapphire" the stone pavement under God's feet when the intention to craft the tablets of the covenant is disclosed Exodus 24:12).

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AV1611VET said:

A little off-record, Tony, but sapphire ranks 9 on the Mohs Hardness Scale.

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