Promotional 25.5cm Onyx Black Optical Crystal Hexagon Award The Onyx Black Hexagons are hand crafted out of optical crystal and are available in 3 sizes. The sloped face on the top of the hexagon can be personalised with any crest, logo or wording to create an award that is sure to take pride of place when put on display at home or at work. They are ideal recognition, achievement or incentive gifts and are supplied in a black foam lined presentation box.