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2. Hematine - Wikipedia

   en.wikipedia.org/wiki/Hematine

   Hematine ring. Hematine (also magnetic hematite, hemalyke or hemalike) is an artificial magnetic material. [1] Hematine is widely used in jewelry. [citation needed]Although it is claimed by many that it is made from ground hematite or iron oxide mixed with a resin, analysis (of one object) has demonstrated it to be an entirely artificial compound, a barium-strontium ferrite.

3. Hematite - Wikipedia

   en.wikipedia.org/wiki/Hematite

   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 ...

4. Maghemite - Wikipedia

   en.wikipedia.org/wiki/Maghemite

   Maghemite (Fe 2 O 3, γ-Fe 2 O 3) is a member of the family of iron oxides.It has the same formula as hematite, but the same spinel ferrite structure as magnetite (Fe 3 O 4) and is also ferrimagnetic.

5. Medieval jewelry - Wikipedia

   en.wikipedia.org/wiki/Medieval_jewelry

   Later Viking jewelry also starts to exhibit simplistic geometric patterns. [27] The most intricate Viking work recovered is a set of two bands from the 6th century in Alleberg, Sweden. [26] Barbarian jewelry was very similar to that of the Vikings, having many of the same themes. Geometric and abstract patterns were present in much of barbarian ...

6. Osteoarthritis - Wikipedia

   en.wikipedia.org/wiki/Osteoarthritis

   Arthrosis, osteoarthrosis, degenerative arthritis, degenerative joint disease: The formation of hard knobs at the middle finger joints (known as Bouchard's nodes) and at the farthest joints of the fingers (known as Heberden's nodes) is a common feature of osteoarthritis in the hands. Pronunciation /

7. Native American jewelry - Wikipedia

   en.wikipedia.org/wiki/Native_American_jewelry

   Wanesia Spry Misquadace (Fond du Lac Ojibwe), jeweler and birch bark biter, 2011 [1]Native American jewelry refers to items of personal adornment, whether for personal use, sale or as art; examples of which include necklaces, earrings, bracelets, rings and pins, as well as ketohs, wampum, and labrets, made by one of the Indigenous peoples of the United States.

8. Engraved gem - Wikipedia

   en.wikipedia.org/wiki/Engraved_gem

   Antelopes attacked by birds: cylinder seal in hematite and its impression. Late Bronze Age II (maybe 14th century BC), from Cyprus in the Minoan period, following Near Eastern precedents. The technique has an ancient tradition in the Near East , and is represented in all or most early cultures from the area, and the Indus Valley civilization .

9. Magnetite - Wikipedia

   en.wikipedia.org/wiki/Magnetite

   Magnetite has been important in understanding the conditions under which rocks form. Magnetite reacts with oxygen to produce hematite, and the mineral pair forms a buffer that can control how oxidizing its environment is (the oxygen fugacity). This buffer is known as the hematite-magnetite or HM buffer.