First of all, rm (full name Forevermark permanent stain) is not owned by Chow Tai Fook, but has a cooperative relationship with Chow Tai Fook, and then TMARK is a diamond brand independently established by Chow Tai Fook on 20 16.
There is no difference between the two in essence, because they are both diamonds. The difference between diamonds is only related to size, color, clarity and cutting, which is often referred to as 4c standard in the industry. Of course, this refers to the product itself, and the diamond brand is of course different. The difference lies in their own brand strength, brand value, product design, quality control and so on.
Forevermark is the abbreviation of De Beers, the world's largest diamond brand, and Chow Tai Fook is a domestic jewelry brand. There will be subtle differences between them. Chow Tai Fook sells forevermark diamond rings. It is of higher quality than ordinary diamond ring, and it is made of the first choice diamond, so it is very popular. Gradually, China people like to be called Chow Tai Fook forever.
Forevermark is actually De Beers Group, a world-famous diamond brand. 90% of the diamonds in the world are produced by this group, with good clarity and color. Chow Tai Fook sells diamonds from forevermark, so it can be regarded as Chow Tai Fook.