We carry two different types of crystals K9 chinese crystal and Egyptian Asfour crystal.
K9 crystals are made in China, although they sparkle the same and uses just as much lead oxide as any other top crystal manufacturers out there (30% PBo), there is still a huge difference. First difference you will notice is the huge price difference, it is about one fifth of the price of Asfour crystals. The other difference is that over time, usually one to two years the crystals will turn into a mirky yellow color. Another difference is that the cut is very different and imbalance, especially the drill hole on the top, you can see that the hole isn't clear and smooth.
Asfour crystals are made in Egypt and is the most popular crystal brand in the world mainly because of the price and quality. The cut is very clean and the crystal quality is very high, can be comparable to Swarovski Crystals. These crystals last forever and will keep its clearness through its life span, which ends when you break it.
You can tell the types of crystals by the price, but if you're still skeptical then look at the drill hole closely . If it's clear and smooth then it is Asfour Crystal or some other type other than K9. Be aware when stores tell you the crystals are Swarovski but sells it at Asfour pricing, look at each crystal, it should have the Swarovski logo embedded in it.