Forget the diamond as big as the Ritz. This one's bigger than planet Earth.
Orbiting a star that is visible to the naked eye, astronomers have discovered a planet twice the size of our own made largely out of diamond.
The rocky planet, called '55 Cancri e', orbits a sun-like star in the constellation of Cancer and is moving so fast that a year there lasts a mere 18 hours.
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http://www.reuters.com/article/2012/10/11/us-space-diamond-planet-idUSBRE89A0PU20121011
The following is an excerpt about precious stones found in Sanhedrin 100a.
R. Johanan was sitting and teaching: The Holy One, blessed be He, will bring jewels and precious stones, each thirty cubits long, and thirty cubits high, and make an engraving in them, ten by twenty cubits, and set them up as the gates of Jerusalem, for it is written, And I will make thy windows of agates, and thy gates of carbuncles.
A certain disciple derided him saying, 'We do not find a jewel even as large as a dove's egg, yet such huge ones are to exist!'
Some time later he took a sea journey and saw the ministering angels cutting precious stones and pearls. He said unto them: 'For what are these?' They replied: 'The Holy One, blessed be He, will set them up as the gates of Jerusalem.'
On his return, he found R. Johanan sitting and teaching. He said to him: 'Expound, O Master, and it is indeed fitting for you to expound, for even as you did say, so did I myself see.'
'Wretch!' he exclaimed, 'had you not seen, you would not have believed! You deride the words of the Sages!' He set his eyes upon him, and he turned in to a heap of bones.
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