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2. Apatite - Wikipedia

   en.wikipedia.org/wiki/Apatite

   Apatite is the defining mineral for 5 on the Mohs scale. [11] It can be distinguished in the field from beryl and tourmaline by its relative softness. It is often fluorescent under ultraviolet light. [12] Apatite is one of a few minerals produced and used by biological micro-environmental systems. [7]

3. Trade beads - Wikipedia

   en.wikipedia.org/wiki/Trade_beads

   Trade beads from ca. 1740, found in a Wichita village site in present-day Oklahoma Nineteenth-century European trade beads found in Alaska Chugach woven spruce-root hat. Trade beads are beads that were used as a medium of barter within and amongst communities. They are considered to be one of the earliest forms of trade between members of the ...

4. Chief's Beads - Wikipedia

   en.wikipedia.org/wiki/Chief's_Beads

   An example of a Chief's bead. The Chief's bead, named "ti-a, co-mo-shack" by North American Natives, are blue glass trade beads used during the late 18th century and early 19th century up and down the West coast of North America and the Columbia River Basin.

5. Blue pigments - Wikipedia

   en.wikipedia.org/wiki/Blue_pigments

   Blue pigments are natural or synthetic materials, usually made from minerals and insoluble with water, used to make the blue colors in painting and other arts. The raw material of the earliest blue pigment was lapis lazuli from mines in Afghanistan, that was refined into the pigment ultramarine .

6. Hydroxyapatite - Wikipedia

   en.wikipedia.org/wiki/Hydroxyapatite

   Hydroxyapatite (IMA name: hydroxylapatite [5]) (Hap, HAp, or HA) is a naturally occurring mineral form of calcium apatite with the formula Ca 5 (PO 4) 3 (OH), often written Ca 10 (PO 4) 6 (OH) 2 to denote that the crystal unit cell comprises two entities. [6] It is the hydroxyl endmember of the complex apatite group.

7. 25 of the very best deals from Nordstrom's Half-Yearly Sale ...

   www.aol.com/lifestyle/the-very-best-deals-from...

   One of the best post-Christmas sales we look forward to every year is Nordstrom's Half-Yearly Sale, which typically kicks off the day after Christmas and lasts for a couple of weeks.Ring in the ...