(Jessica Morrison 06 April, 2014) - https://www.nature.com/articles/nature.2014.14993
(Fire Mountain Gems and Beads, Inc. 2008- 2022) - https://www.firemountaingems.com/?gclid=CjwKCAiAvK2bBhB8EiwAZUbP1ED-TiRzQe98rqskTcRSnCp2VXVA-zFHAynbZOiGQgPO1KV_aqiguhoCHLgQAvD_BwE
(Dana, 1837, 341, "Syst. Min. 1st Ed.") - https://www.mindat.org/min-436.html
(Gem Rock © 2005-2022) - https://www.gemrockauctions.com/learn/a-z-of-gemstones/aventurine-stone
(Geology.com © 2005-2022) - https://geology.com
(The United States Geological Survey, 2022) - https://www.usgs.gov/faqs/what-are-metamorphic-rocks
( Tulane University 28 April, 2018) - https://www2.tulane.edu/~sanelson/eens1110/sedrx.htm
( National Geographic Society © 1996 - 2022) - https://education.nationalgeographic.org/resource/igneous-rocks
(South Carolina Department of Natural Resources 2005) - https://www.dnr.sc.gov/geology/pdfs/education/Geologic%20Time.pdf
(Measuring Geolical Time[textbook ch. 8.1-8.6]) - https://vvc.instructure.com/courses/17386/files/2393173/download?wrap=1