Friday, March 24, 2017
Friday, October 14, 2016
Necklaces are believed to be as old as 40,000 years, during the Stone Age. The oldest necklaces were made of purely natural materials - before weaving and the invention of string, durable vines or pieces of animal sinew left over from hunts were tied together and adorned with shells, bones or teeth or colourful skins of human prey animals, bird feathers, corals, carved pieces of wood, colorful seeds or stones or naturally occurring gems, or other beautiful or artful natural elements found nearby.
Thursday, October 13, 2016
Originally, rhinestones were rock crystals gathered from the river Rhine, hence the name, although some were also found in areas like the Alps. The availability was greatly increased in the 18th century when the Alsatian jeweller Georg Friedrich Strass had the idea to imitate diamonds by coating the lower side of glass with metal powder. Hence, rhinestones are called strass in many European languages.
Wednesday, October 12, 2016
Prior to the introduction of plastics, ivory had many ornamental and practical uses, mainly because of the white color it presents when processed. It was formerly used to make cutlery handles, billiard balls, piano keys, Scottish bagpipes, buttons and a wide range of ornamental items.
Synthetic substitutes for ivory in the use of most of these items have been developed since 1800: the billiard industry challenged inventors to come up with an alternative material that could be manufactured; the piano industry abandoned ivory as a key covering material in the 1970s.
|Vintage Scottish ivory bagpipes|
Tuesday, October 11, 2016
The first archaeological evidence known of usage of the obsidian were made from within Kariandusi and other sites of the Acheulian age (beginning 1.5 million years previously) dated 700,000 BC
Monday, October 10, 2016
Being a phosphate mineral, turquoise is inherently fragile and sensitive to solvents; perfume and other cosmetics will attack the finish and may alter the colour of turquoise gems, as will skin oils, as will most commercial jewellery cleaning fluids. Prolonged exposure to direct sunlight may also discolour or dehydrate turquoise. Care should therefore be taken when wearing turquoise jewellery. Cosmetics, including sunscreen and hair spray, should be applied before putting on a turquoise piece of jewellery. Also, you should not wear it to a beach or other sun-bathed environment. After use, turquoise should be gently cleaned with a soft cloth to avoid a buildup of residue, and should be stored in its own container to avoid scratching by harder gems. Turquoise can also be adversely affected if stored in an airtight container.
|Silver ring with turquoise and sugilite|