The main reason for the information gap is that companies are trying to set an agenda; they will say whatever benefits them the most. For example, we found one company in the UK that openly told its customers that CVD was the best and advised them to avoid buying HPHT. Another company in the US told its customers that HPHT was the best but refused to buy CVD diamonds. In fact, both are misleading their customers with misleading and often false statements. Because both CVD and HPHT technologies can produce diamonds of all colours, clarity and sizes, from unsellable to flawless diamonds.
What happens behind the scenes is that the labs that create the diamonds have an agreement with the diamond suppliers to offer a better price for CVD diamonds and not the same price for HPHT diamonds, or vice versa. So the diamond suppliers say whatever they have to say to protect their own interests.