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  2. Bakelite - Wikipedia

    en.wikipedia.org/wiki/Bakelite

    Bakelite (/ ˈbeɪkəlaɪt / BAY-kə-lyte), formally poly­oxy­benzyl­methylene­glycol­anhydride, is a thermosetting phenol formaldehyde resin, formed from a condensation reaction of phenol with formaldehyde. The first plastic made from synthetic components, it was developed by Leo Baekeland in Yonkers, New York, in 1907, and patented on ...

  3. Amber - Wikipedia

    en.wikipedia.org/wiki/Amber

    Amber is a macromolecule formed by free radical polymerization [24] of several precursors in the labdane family, for example, communic acid, communol, and biformene. [25][26] These labdanes are diterpenes (C 20 H 32) and trienes, equipping the organic skeleton with three alkene groups for polymerization.

  4. Breast milk jewelry - Wikipedia

    en.wikipedia.org/wiki/Breast_milk_jewelry

    Filled styles use a preserved breast milk and resin mix to fill holes or openings in jewelry pieces, usually Sterling Silver. [1] Generally, the filled shapes are trees, leaves, or hearts representing love and life. Various methods may be used to make the jewelry. To preserve and protect it, the piece may be covered in a clear resin or glaze. [1]

  5. Jewellery - Wikipedia

    en.wikipedia.org/wiki/Jewellery

    Jewellery. Jewellery (or jewelry in American English) consists of decorative items worn for personal adornment such as brooches, rings, necklaces, earrings, pendants, bracelets, and cufflinks. Jewellery may be attached to the body or the clothes. From a western perspective, the term is restricted to durable ornaments, excluding flowers for example.

  6. Bead - Wikipedia

    en.wikipedia.org/wiki/Bead

    A bead is a small, decorative object that is formed in a variety of shapes and sizes of a material such as stone, bone, shell, glass, plastic, wood, or pearl and with a small hole for threading or stringing. Beads range in size from under 1 millimeter (0.039 in) to over 1 centimeter (0.39 in) in diameter. Beads represent some of the earliest ...

  7. Ozoroa paniculosa - Wikipedia

    en.wikipedia.org/wiki/Ozoroa_paniculosa

    Kuntze. Ozoroa paniculosa (previously Heeria paniculosa), commonly known as the bushveld ozoroa or common resin tree, is a small tree belonging to the mango family or Anacardiaceae. It is native to southern Africa, where it occurs in Zimbabwe, South Africa, Mozambique, Botswana and Namibia. It grows to a height of about 6 metres at high ...

  8. List of South African inventions and discoveries - Wikipedia

    en.wikipedia.org/wiki/List_of_South_African...

    1950, Sasol, the country's largest fuel producer, was founded. 1950, Q20 lubricant was invented by Mr. Robertson in Pinetown. [2] Q20 is an all purpose lubricating spray that is owned by the Triton-Leo Group (Pty) Ltd. [3] The name derives from "it has 20 answers to 20 questions". 1957, Flame ionization detector by Harley and Pretorius at the ...

  9. Jewellery design - Wikipedia

    en.wikipedia.org/wiki/Jewellery_design

    Jewellery design. Jewellery design is the art or profession of designing and creating jewellery. It is one of civilization's earliest forms of decoration, dating back at least 7,000 years to the oldest-known human societies in Indus Valley Civilization, Mesopotamia, and Egypt. The art has taken many forms throughout the centuries, from the ...