BETA

Colorado Golden Vein

Submitted by Intern on Tue, 2015-03-10 10:48
Availability: 
Available
Geology
Stone Type (Lithologic): 
Grain Shape: 
Angular
Grain Size: 
Medium
Petrographic Description: 

Specimen:2015-007-1
This sample is a moderately coarse grained marble. The texture is overall granoblastic with random grain orientation. Maximum carbonate grain size is around 1 mm, minimum is .06 mm, the modal size is approximately .5 to .2 mm. Grain boundaries are curved, straight, and rarely minimally sutured. Twinning lamellae in carbonates are common. The only non-carbonate accessory mineral is extremely rare quartz that occur as individual crystals between carbonate grain boundaries. These quartz crystals have a modal size around .04 mm and occur in only trace quantities. There is some incipient structure to the marble with patterned variation in crystal sizes across the slide. Diffuse banding/clouding is visible in the hand sample that cannot be tied to any variation seen in the thin section.
MP 9/5/2015

Specimen:2015-007-2
This sample is a moderately coarse grained marble. The texture is overall granoblastic with random grain orientation. The texture varies to near polygonal equant in some areas. Maximum carbonate grain size is around 1.3 mm, minimum is .04 mm, the modal size is approximately .5 to .2 mm. Grain boundaries are curved, straight, and rarely minimally sutured. Twinning lamellae in carbonates are common. The only non-carbonate accessory mineral is extremely rare opaque minerals. These occur as both inclusions and at carbonate grain boundaries. There is no appreciable macrostructure visible in this slide. Diffuse banding/clouding is visible in the hand sample that cannot be tied to any variation seen in the thin section.
MP 9/5/2015

Images

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Specimen ID
2015-007-1 Image of specimen in dry conditions. Finish: Honeddownload image
2015-007-2 Image of specimen in dry conditions. Finish: Polisheddownload image

Thin Sections

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Specimen ID Non-polarized Cross-polarized
2015-007-1 Specimen shown in non-polarized light.download image Specimen shown in cross-polarized light.download image
2015-007-2 Specimen shown in non-polarized light.download image Specimen shown in cross-polarized light.download image

Quarry

No quarry information available for this stone.

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