800.818.2646 / 626.396.4060 / 626.396.4065 fax
2515 Huntington Drive, San Marino, California, 91108, USA

We are buyers of all types of diamonds. Old mine cut and European cut as well as modern Stones. We buy them with or without GIA certification. 

There are four factors which determine the value of a diamond, They are often referred to as the "Four C's" They are:

• CUT - The shape and proportions of a diamonds cut effect the brilliance and fire. Old style and poorly cut diamonds often need to be re-cut in order to make them saleable. Re-cutting a stone although reducing the carat weight can improve the clarity and color.  
• CLARITY - Clarity of a stone is the natural inclusions, fractures and other structural features inside a diamond. With the aid of lasers and acids diamonds can be treated to make them more attractive but those treatments do not improve the value of a diamond. Fewer inclusions make for a more valuable diamond. 
• COLOR - Most diamonds have some color, usually a shade of yellow. Colorless diamonds are more valuable than lightly colored ones. Fancy colors like pink and blue, if rich enough in color can be valuable. Diamonds can be treated to have artificial color which again does not increase their value.  
• CARAT - This is the weight of the diamond. Large diamonds are rare and that adds to their value. Small stones are quite common and have little value. 10 stones that together weigh one carat are worth a fraction of what a single one carat diamond is worth