Prehnite Drops Briolette or Loose Gemstone Beads with full drill, half drill and side drill are available in all sizes from 5x3mm to 24x10mm. Other sizes and cuttings are also available on demand. All the stones are cut & polished in Jaipur (India). Actual color of the stone may vary from the picture shown. All the stones are with strict calibration and will come approx (+-0.10mm). For any other query or details, please write us at [email protected].