Promotional 12.5cm Optical Crystal Sloping Diamond The perfectly clear optic crystal Sloping Diamonds are hand crafted and are available in 3 sizes. The stylish facet design reflects light at various angles and when combined with the engraving creates an impressive presentation gift. They can be personalised with any crest, logo or wording and are sure to take pride of place when put on display at home or at work. They are supplied in a black foam lined presentation box.