Dawn Potpourrie - a photo on Flickriver

Dawn Potpourrie

Dawn Colors,
,צבע השחר
Couleurs de l'Aube,
Colores del Amanecer

Samples from Asarco mines in Sahuarita, near Tucson are an almost perfect match to our copper rocks. Here is a Flickr photo of a huge specimen of chrysocolla on the ASARCO copper mine grounds, Sahuarita, AZ. I got ours at a rock and gravel company in Tucson. From time to time, they get tailings from the Asarko mines..

www.flickr.com/photos/expknitter/3817822493/

Chrysocolla (hydrated copper silicate) is a mineral, (Cu,Al)2H2Si2O5(OH)4·nH2O. It is of secondary origin and forms in the oxidation zones of copper ore bodies. Associated minerals are quartz, limonite, azurite, malachite, cuprite, and other secondary copper minerals.

Chrysocolla has an attractive blue-green colour and is a minor ore of copper, having a hardness of 2.5 to 3.5. It is also used as an ornamental stone. It is typically found as glassy botryoidal or rounded masses and crusts, or vein fillings. Because of its light color, it is sometimes confused with turquoise. Commonly it occurs only as pourous crusts unsuitable for gem use, but high quality, gem grade chrysocolla can be translucent and is highly prized.

The name comes from the Greek chrysos, "gold", and kolla, "glue", in allusion to the name of the material used to solder gold, and was first used by Theophrastus in 315 BCE.

www.mindat.org/min-1040.html

IMG_3900 - Version 2

Some rights reserved

Taken on: May 8, 2017

Sets appears in: • Dawn Colors, צבע השחר, Couleurs de l'Aube, Colores del Amanecer + Chrysocolla

Camera: Canon EOS 70D, f/5.0, 1/100 sec, 72mm, ISO 1600 (more info) (hide info)

Camera:	Canon EOS 70D
Lens:	Canon EF-S 18-135mm f/3.5-5.6 IS STM
Aperture:	f/5.0
Exposure Time:	0.01 sec (1/100)
Focal Length:	72mm
ISO:	1600
Exposure Bias:	0 EV
Flash:	Off, Did not fire
Exposure Program:	Not Defined
Exposure Mode:	Auto
Metering Mode:	Multi-segment
White Balance:	Auto
Color Space:	sRGB
Software:	iPhoto 9.6.1
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