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Hematite (/ ˈ h iː m ə ˌ t aɪ t, ˈ h ɛ m ə-/), also spelled as haematite, is a common iron oxide compound with the formula, Fe 2 O 3 and is widely found in rocks and soils. [6] Hematite crystals belong to the rhombohedral lattice system which is designated the alpha polymorph of Fe 2 O 3. It has the same crystal structure as corundum ...
Ornaments from the past, bead studies after Beck: a book on glass and semiprecious stone beads in history and archaeology for archaeologists, jewellery historians and collectors. Bead Study Trust. pp. 108– 114. ISBN 9789749116593. OCLC 52696051. S2CID 190916548. Davison, Claire C. (September 1972).
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.
Egyptian faience was very widely used for small objects, from beads to small statues, and is found in both elite and popular contexts. It was the most common material for scarabs and other forms of amulet and ushabti figures, and it was used in most forms of ancient Egyptian jewellery, as the glaze made it smooth against the skin.
Glass bead making has long traditions, with the oldest known beads dating over 3,000 years. [1] [2] Glass beads have been dated back to at least Roman times. Perhaps the earliest glass-like beads were Egyptian faience beads, a form of clay bead with a self-forming vitreous coating. Glass beads are significant in archaeology because the presence ...
Waist beads actually originated in ancient Egypt, where they were known as girdles.Egyptians wore them around their waist or lower abdomen. [2] [3] Girdles were symbols of status and were made of chains, wire, thread, and shells, and often featured multiple colors [4] Modern-day people from many African cultures wear waist beads, including Ghanaians, Senegalese, Igbos, Yorubas, Ewes, Ashantis ...
The size of the oolites reflect the time that they were exposed to the water before they were covered with later sediment. Oolites are often used in the home aquarium industry because their small grain size (0.2 to 1.22 mm) is ideal for shallow static beds and bottom covering of up to 1" in depth.
The components are divided into three groups according to their size. Mineral particles like sand and limestone are classified as fine (60-250 μm), medium (250-500 μm), and large (larger than 500 μm), while straw is categorised as fine (smaller than 2 mm), medium (2–5 mm), and large (over 5 mm). [62]
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