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These 12mm calibrated round Black Agate Onyx gemstone beads are a precise measured round bead, the strand length is approximately 39-40cm and will contain around 31-33 beads, this can sometimes be more or less, occasionally the bead size may vary, we will note the measured size in the product title in brackets if this is the case. These beads are sold by the length, loose strung (temporary strung) ready to be incorporated into your jewellery designs. The standard drill hole is around 1mm. Black Agate is characterised by its opaque Black colour, more information can be found out about Agate on our Gemstone Reference sheet.
