Nice cluster of sharp calcite crystals from Daye, China.  The salmon-coloured core zone of each crystal gives the rest of the colourless crystal zones a nice tint.  In excellent condition - no damage at all to the two main crystals. Soeme cleaved tips on smaller ones - clean and not distracing. The large crystal on the right measures 4.6 cm - it is a good single crystal with no twinning.  The large crystal on the left shows twinning - visible in the third photograph - neat to have a featured twinned and untwinned crystal side-by-side on the same specimen like this.