Scratching 2 Stone to see Mohs Scale

[suryagiri2012]

I hear that scratching is one thing to test gemstone. Using Mohs scale can determine the type of stone, like diamond is the only one that can cut ruby and saphire. I had a cabochon ruby and try to scratch it with the blue stone and the ruby was left with white cloudy texture in the stone, when cleaned there is line damage on ruby and so in the blue one. The damage on the ruby is permanent and I don't know if it is said as scratched or not (what's the differences betwen scratched and chipped when rubbed between 2 stone).

Can this test give idea that the Mohs scale of the blue stone is the same with Mohs scale of ruby? Any opinion will be very helpful. Thank you in advance.

 

[whitewave]

Don’t do that. My 2 cents.

 

[LilAlex]

I guess your blue stone is a diamond -- must be worth a fortune!

I suspect the ruby is heavily treated or else it is not a ruby. I don't think briefly rubbing two stones of identical hardness together (ruby vs sapphire) would do the type of damage you describe.

As @whitewave says above, not a great idea. "I backed my Mercedes into my BMW because I wanted to see which one was tougher." Do you really want to know that answer?

 

[Bron357]

You should never conduct “hardness tests” on gemstones because one or other of the gemstones will be damaged.
No gemologist uses a hardness test by trying to scratch one gem with another, instead they use specific gravity, a loupe or microscope plus a range of other non damaging tests.
The photo you posted looks like a chunk of glass.

 

[Nick_G]

The dark blue chunk looks to me like uncut CZ.