DENDRITIC AGATE MERLINITE SLAB 7
A super good quality polished Dendritic Agate Merlinite Slab 7. It is known by many names, common opal, opalite, dendritic agate and Merlinite for the more poetic among us. This is old stock and really is a better quality than most available at present, with some transparency. Polished both sides and a reasonable thickness for working into a lovely Aussie pendant or other jewellery item.
Norseman, Western Australia, Australia.
9.8cm x 5.9cm x 0.75cm, 71g.
nH2O Hydrated Silicon Dioxide.
Opal has been a popular gem for many centuries and has a very interesting structure. The name opal comes from the Sanskrit name for precious stone upala. Opal structure is not crystalline and considered a mineraloid. The chemistry of Opal is primarily SiO2 and varying amounts of water. The amount of water varies from 5 -10% and greater. This water can help geologists determine the temperature of the host rock at the time the opal formed.