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 Post subject: what and why is Tension in rough diamond?
PostPosted: Thu Nov 06, 2014 12:32 am 
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hi all,

i am new bee here. one question about tension under polariscope in rough diamond, what is it actually? what does it (week or strong) stand for? why it happens?

could anyone help?


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 Post subject: Re: what and why is Tension in rough diamond?
PostPosted: Mon Jan 19, 2015 8:06 am 
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Joined: Thu Mar 15, 2007 11:50 pm
Posts: 299
Location: Virginia, USA
You seem to be referring to the abnormal double refraction patterns that show up when an isometric system crystal (such as diamond) having internal stress is viewed between crossed polarizers. It is caused by the distortion of the crystal lattice that became locked into the diamond during its formation and later transport to the low temperature environment at the surface of the Earth.

An amorphous substance like glass will also show stress patterns after rapid cooling, and could easily shatter unexpectedly, but annealing will remove internal stress. In the case of diamond- who knows? I hope this helps.

DD


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