Crystaline Gem Translucent: Fully Crystalized and Translucent Slabs. Acquire the characteristics and color of Semi-Precious Stones such as big slabs in Acquamarine (Caribbean Blue), Sapphire (Blue), Amethyst (Purple), Citrine (Yellow), Emerald (Green), Ruby (Red), Black Diamond (Black), Blue Diamond (Mixture of Colors with Predominant Blue and Red) and Topaz (Brown).