Heat up Opals in Microwave ! ? (2)

Now, into microwave.

What will happen to these opals ?

Place a plate on a turn table .....

Set time for three minutes, in high heat.

Press start button !


Opals are turning around, and around....

30 seconds to go.

Something's started to smell inside microwave just after 2 minutes of heating.
What could be happening to the opals !?