These cz's are the highest quality cz's available.  Also known as Diamond CZ, they are used to replace real diamonds in window display jewellery.  If you want the best stones for your jewellery, then here they are.  It is important to choose good quality cubic zirconia for your jewellery.  Just replacing a bad quality cz with a good one can make so much difference.  If you want beautiful jewellery, then you need quality gems.

Cut:  Marquise, high quality
Carat:  Select from drop down list
Clarity: VVS1 - Flawless
Colour:  Clear / White

There are many types of diamond simulants available, the best in the world is Cubic zirconia.  High quality CZ's visually match a diamond perfectly, but not so with low quality poorly cut stones.  It is low quality stones that fade over time that give CZ a bad reputation.  This CZ you are buying will not fade over time and is cut to the highest standard.  It is very hard, 8.5mohs. Like a diamond, it can cut glass and cannot be scratched by any normal household objects.

Only things that are harder than 8.5 mohs can scratch the surface, things like rubies, sapphire and diamonds.  Things that would not likely come into contact with the cz, so it is a tough durable gem that will last a long time.  If you get a sharp steel knife and try to make even a tiny scratch in the surface, it is impossible.  So, even though it is not as hard as a diamond, it is close.  Hard enough to last for years.  Anyway, even if it didn't, it's cheap to replace.