You may be thinking of Moissanite?
topaz
You can browse the link, below, to see the gemstone diamond, which is the April birthstone.
its a gemstone
Yes there is it is Diamond
it is a red diamond
Natural diamonds can be industrial diamonds or gemstone quality diamonds. Gemstone quality diamonds are worth more than industrial diamonds. If by 'industrial', you mean man-made, then a natural diamond will always be more valuable than a man-made diamond of equal carat weight, unless the natural diamond is not of gemstone quality.
Your question can only conjur up a collision between a diamond and a meteorite. And your question is probably based on your doubt that diamond is the hardest mineral, or at least what does 'the hardest mineral' really mean, practically. Smashing a diamond with anything, including a meteorite, is an awful waste of a gemstone. And yes, there are ways to smash a diamond.
A diamond
Yes, a diamond is a precious gemstone.
Topaz is its own gemstone, just like and emerald and a diamond. Crystal is something else though.
a diamond
Depends on what it actually is. If it's a Zircon (Cubic Zirconia), a Spinel or a synthetic Diamond then yes, it is still a gemstone.
Your answer depends on its cut, clarity, colour, and whether or not the weight of the stone you describe is a gemstone or an industrial diamond.
A diamond is a gemstone.
You can browse the link, below, to see the gemstone diamond, which is the April birthstone.
its a gemstone
CZ stands for Cubic Zirconia, which is a synthetic gemstone. The difference between a diamond and a CZ is that the diamond is a real gemstone. CZ weighs more than a real diamond and is more affordable.
Yes there is it is Diamond