Diamond Hardness: Mohs Scale & Moissanite Comparison

Question
I heard that diamonds are 9 in hardness, diamonique, an 8, and another variety
altogether (?) an 8.5.  What is it called?  Mossa...? something?

Answer
Hi cynthia,

Actually, diamonds are 10 on the moh scale. Ruby is 9 but the space between 9 and 10 is greater than one.  Moissanite
is a new synthetic that is supposed to be harder than 9 but I have cut and polished them and I do not agree. They are probably 9 in hardness.  It is a tungsten carbide crystal.

Regards,
Steven Covey