Blue Halite on Sylivite

Blue Halite on Sylivite

Your Price: $525.00
Part Number:DCO17-BHAL2
From: Kerr McGee Mine, Carlsbad, New Mexico 
Size: 5.3 x 3.0 x 3.2cm
Weight: 52g (including base) 

The blue halite crystal cube itself is highly saturated, yet extremely gemmy, and measures 1.9cm tall. It sits on a bed of sylvite, and next to it is some regular, clear halite. The clear halite that it is embedded in is like a chunk of glass. The condition is absolutely perfect! 

The blue halite formed first - tens of millions of years ago. The surrounding Sylvite mineral contains radioactive Potassium 40 which has an incredibly long half-life of 1 billion years. This means the radiation is so low that geiger counters have a hard time even picking it up. Potassium 40 is also found in bananas, but the radiation is so low that it's harmless to ingest. That being said, over tens of millions of years this low radioactivity takes its toll on the halite, effectively altering the crystal lattice which gives it its blue color. The blue is not chemical - it's just a result of radiation on regular old table salt. The clear halite grew in more recently, and it hasn't had time to be turned blue by the potassium in the Sylvite. 

The specimen comes with a labeled acrylic display base.

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