Serinity hotfix crystals Rhombus (2709) Crystal AB are flat back crystals where the reverse side of the crystal has been pre-coated with a heat-sensitive glue. Serinity Rhombus shaped crystals have a diamond-like shape with four equal sides and two acute angles. They have a faceted surface that catches and reflects light, creating a dazzling and sparkling effect.

Crystal AB is a colourless, transparent crystal bead that has a special coating that reflects light in a rainbow of colours, hence the name AB which stands for Aurora Borealis. It is a popular colour in the world of jewellery making and beading, as it adds a touch of sparkle and glamour to any design.