Four single Tanzanite crystals, and not the typical single blue crystal either. One crystal is blue with attached Calcite and pyrite. The other 3 are good bi-colored crystals (yellow and blue), which are uncommon. The crystal with the Calcite is 1.5cm tall.  The shorter, fat crystal is 1.2 x 1.2 x 1 cm; the other 2 are 1.5 cm and 1.2 cm tall. A great little collection of Tanzanite!