Kōrero: Gemstones

Chalcedony and agate

Chalcedony consists of microscopic crystals of quartz, so small that they can only be seen under the microscope. Different coloured forms are given different names; for example, carnelian is reddish. Agate is a specific form of chalcedony that has parallel banding.

Te whakamahi i tēnei tūemi

Te Ara - The Encyclopedia of New Zealand
Photograph by Alastair McLean

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Ngā whakaahua me ngā rauemi katoa o tēnei kōrero

Te tuhi tohutoro mō tēnei whārangi:

Jocelyn Thornton, 'Gemstones - Quartz', Te Ara - the Encyclopedia of New Zealand, http://www.TeAra.govt.nz/mi/interactive/5122/chalcedony-and-agate (accessed 12 December 2019)

He kōrero nā Jocelyn Thornton, i tāngia i te 12 Jun 2006