Should gem be heated one or natural ?

[Guest guest]

Hi can anyone throw light on the question that one who wears a gem should have a

heated one or should be a natural one..........

 

and what carat of yellow sapphire is good for a person ?...........

 

which gems are good indian or celonese

 

and i had seen one yellow sapphire in thailand which was costing US $1000 ( for

3 carat ) and we can get in india or on rudraksha-ratna website for nearly

14,000 /- so when there are so many difference in the market for the prices how

should one decide that which one is good and which not ???

 

 

Please throw some light............Om Namho Shivai...........