mineralogy – Page 2 – Emily Zawacki, Ph.D.

mineralogy

Precious Opals

July 19, 2014August 15, 2018 itssedimentary

Specimens from American Museum of Natural History - NYC Image by author

mineralogy

Minerals of the World

July 19, 2014August 15, 2018 itssedimentary

Super happy with my new poster! Every time I would go to the Field Museum in Chicago, I’d always look for this poster but it would always be the /one/ that was out of stock. Last week I went to the American Museum of Natural History in NYC, and they actually had this poster in… Continue reading Minerals of the World

mineralogy

Tourmaline

July 17, 2014August 15, 2018 itssedimentary

Tourmaline (Elbaite) - Newry, Maine American Museum of Natural History Image by author

mineralogy

Microcline

July 15, 2014August 15, 2018 itssedimentary

Image by author

mineralogy

Vein quartz

July 14, 2014August 15, 2018 itssedimentary

If a channelway for hydrothermal solutions is left incompletely filled with mineral matter, there may be cavities, or “vugs” in the deposit which will be lined with inward pointing crystals. These are quartz crystals, showing mainly the pyramid (or, more exactly, rhombehedron) faces. The quartz was deposited on a rounded surface of hydrothermal hematite (Fe2O3)… Continue reading Vein quartz