12 cm x 6 cm / 4.75 inch x 2.25inch
 
Sentient PLASMA Crystals™ are somewhat of a mystery... according to those that have purchased one, the crystal DOES become individual, and works with the owner exclusively.   They are the highest rated pure crystal known to man.
These, in particular, chose to be named "sentient" to open up the mind to who they are.  The intelligence of the crystal allows for the individual to seek higher learning, according to the individual's needs, and this is apparent immediately to the owner.   
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HIGH COLUMBIAN / GEM QUARTZ / SEMI-PRECIOUS /JEWELRY-GEM GRADE