1. BUY FROM A REPUTABLE COMPANY
This is very important when it comes to buying an expensive product. You don't want to be scammed by other people. It is important that you buy from someone you trust as well. Like I said from my last post, don't trust anyone in this industry 100%! When you buy a diamond, request your jeweler to show you all the details on the certificate. Make sure the jeweler educate you and you know what you're buying.
2. WHAT IS MY JEWELRY MADE OUT OF?
When you're buying high-end jewelry, there's always a stamp hiding somewhere telling you what your jewelry is made out of. It is usually engraved in the inner circle of the ring or on the buckle or tags of bracelets and necklaces. I don't recommend jewelry that is made of nickels.
3. WHAT DO THE STAMPS MEAN?
If you see stamps like "750" it represents 18K Gold. 18K gold is made out of 75% pure gold and 25% mixed in with different alloys to make the color and stronger. 18K gold maintains it's sheen and luster more than platinum. Every time you go professionally clean and polish, they take a thin layer of gold out. Antique rings that are made out of 18K gold became really thin, this is the reason why. If there is nothing wrong with your ring, I suggest to professionally clean and polish once every 3-5 years. 18K gold is more malleable than platinum, so it is easier to make artistic designs with 18K gold than platinum.
Platinum will stamp "PT950". Platinum jewelry is made out of 95% pure platinum and 5% of other alloys. It is soft, so it scratches and dents more easily than 18K gold. It is very dense, so it feels heavier than 18K gold. Platinum dulls easily and doesn't maintain its sheen like 18K gold. When you do a professional clean and polish, it maintains its weight, it is more ductile than gold.
4. INSCRIPTION IS IMPORTANT
It is important that there is an inscription on the diamond that matches the GIA certificate. The inscription is really small and could be read under a 10X magnifying loupe by a trained eye. Have the jeweler to read out the numbers for you so it matches the number on the certificate.
5. KNOW YOUR PRICING
Ask your jeweler to show you the Rapaport report and explain to you how the diamond pricing works so that you have an idea how much you're spending on your diamond. The discount they offer you from the Rapaport depends on the supply and demand of the diamond you're looking at.