Saw this post, and....

I saw this post here by @HyperNovaStar and as part time protoss mining advisor I feel like obligated to talk a bit more on this unique mineral. It's a lovely mineral and aesthetically mesmerizing. It's iron phosphate hydrate mineral, with chemical formula of FePO4 · 2H2O.

This mineral is actually called strengite after a 19th century german minerologist Johann August Streng.

This terran german guy is Johann August Streng. (February 4, 1830 Frankfort, Germany - January 7, 1897 Giessen, Germany), Professor of Mineralogy, University of Giessen, Germany.
Streng was an assistant to Robert Bunsen (yeah, that bunsen burner guy) at University of Heidelberg and later professor of chemistry at the Clausthal Mining Academy. Streng was an innovator in new methods of chemical titration.

Fascinatingly, they also occur in myriad of color. Samples can be Lavender, colorless, pale violet, deep violet, red, carmine red, greenish white, pink or purple in hue, it is similar to variscite. They have orthorombic crystal class system. But they normally occur as either botryoidal, radial or spherical deposit.This sample is from cornelia mine, Bavaria, Germany.

This particular specimen is also from Bavaria. As you can see this one grow radially. Strengite is partially soluble mineral, especially in acidic and low redox potential environment. They have specific gravity of 2.84 and rated 3.5-4 in Mohs hardness scale. That means they can easily be scratched by a penny, knife or glass.

They're rare because dragons loves to eat them. It's like turkish delight to dragons. One dragon specialist mention it helps to build internal iron scale to help them breath fire.

The strengite mineral also didn't have real use to terran, other than being a nice lovely specimens to mineral collector.

Occuring in small sizes doesn't help them too in being common, as making a mine for non-industrial small occuring mineral isn't profitable. They normally occurs as a secondary mineral in phosphatepegmatite deposits, and in iron-rich sedimentary sandstones.

This sample is from Folgosinho quarry, Portugal is sitting on top of another mineral, cacoxenite.

Look at that vitreous transparent to translucent magnificent crystal! They've density ranging between 2.84 - 2.87 g/cm3. As lovely as they're, they're just as brittle as our inner heart, so making jewellery out of it is far from ideal.

This specimen is from Alabama, USA.

Sauce:
https://en.m.wikipedia.org/wiki/Strengite?wprov=sfla1

https://www.mindat.org/min-3801.html

http://m.minerals.net/MineralDefinition.aspx?name=strengite

Anthony, J.W., Bideaux, R.A., Bladh, K.W., and Nichols, M.C. (2000) Handbook of Mineralogy, Volume IV. Arsenates, Phosphates, Vanadates. Mineral Data Publishing, Tucson, AZ, 680pp.: 567.

Song, Y., Zavalij, P. Y., Suzuki, M. & Whittingham, M. S. (2002): New iron(III) phosphate phases: crystal structure and electrochemical and magnetic properties. Inorganic Chemistry 41, 5778-5786. 

Large gallery of strengite:
https://www.mindat.org/gm/3801

Cat tax!
Sorry that's a long post :')
Gotta continue serve for lord artanis now.