A rock crystal, amber and Mexican fire opal necklace, the necklace composed of a strand of alternating rock crystal and amber beads, centring a large triangular-shaped Mexican fire opal pendant, weighing approximately 41.50 carats, gross weight approximately 83.50 grams, the clasp mounted in 18ct white gold, length 42.00 cm. Mexican fire opals can be found all over the world, but most come from Mexico, in their highlands in areas with extinct volcanoes. These gems are distinguished by their beautiful colour, often slightly cloudy, but with expressive tones reminiscent of fire, earth and sunlight., Cf. A. Quan, Tony White: Jeweller, New South Wales, Tony White, 2016, p. 95 for necklace of similar design, and p. 60 for text.
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- Amber - More frequently used to refer to the colour, than the material from which the word is derived, amber is the fossilized resin from ancient forests. It is not produced from tree sap, but rather from plant resin. The resin is aromatic, and can drip from and ooze down trees. In colour, it may be a deep honey colour, (amber), brown, or white. As it oozes out it fills internal fissures in the tree, trapping debris such as seeds, leaves, feathers and insects. The debris trapped within the amber can assist in dating the deposit.
In its natural state it is found in rocks, on the sea floor (from where it may be washed up to the shore) and mined, using both open cut and underground techniques. About 90% of the world's amber comes from Russia. Amber has recently been discovered at Cape York in Northern Australia
Amber is often incorporated in jewellery, and used in pipe stems. The shine on the surface of amber becomes even more intense when it is worn and used regularly. Genuine amber, when rubbed, will release a slightly musky scent.
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