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This page was last edited on 6 February 2025, at 11:20 (UTC).; Text is available under the Creative Commons Attribution-ShareAlike 4.0 License; additional terms may apply.
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 ...
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.
A Kayan woman wearing neck rings The Celtic gold Snettishham Torc, England, 1st century BC. Neck rings, or neck-rings, are any form of stiff jewellery worn as an ornament around the neck of an individual, as opposed to a loose necklace. Many cultures and periods have made neck rings, with both males and females wearing them at various times.
Agate (/ ˈ æ ɡ ɪ t / AG-it) is a fibrous, banded variety of chalcedony. [1] Agate stones are characterized by alternating bands of different colored chalcedony and sometimes include macroscopic quartz.
SGI Onyx is a series of visualization systems designed and manufactured by SGI, introduced in 1993 and offered in two models, deskside and rackmount, codenamed Eveready and Terminator respectively. The Onyx's basic system architecture is based on the SGI Challenge servers, but with graphics hardware.