Colorado Yule

Submitted by Raven Mueller on Thu, 2014-07-10 09:57
Stone Type (Commercial): 
Physical Data
Munsell Color(s): 
Stone Type (Lithologic): 
Grain Shape: 
Grain Size: 
Petrographic Description: 

Specimen: 2014-054

This sample is relatively fine grained marble. The texture is granoblastic with random grain orientation. Maximum grain size is near 1.75 mm, minimum is .15 mm, and the modal size is around .75 mm. Twinning of calcite/dolomite crystals is ubiquitous and mostly follows rhomb edges. Grain boundaries are mostly sutured. Non-carbonate accessory minerals are extremely rare (~1%) and generally too small for definitive identification with a modal size near .1 mm. Based on birefringence value and lithological context diopside, sillimanite, or tremolite among others are possible identifications. Quartz is also present in lesser quantities. Most accessory grains appear as shapeless, rounded inclusions within calcite crystals or at grain boundaries. There is no appreciable weathering in this sample or visible macrostructure such as foliation.

MP 7/7/2015


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Specimen ID
2014-054 Image of specimen in dry conditions. Finish: download image Image of specimen in wet conditions. Finish: download image

Thin Sections

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Specimen ID Non-polarized Cross-polarized
2014-054 Specimen shown in non-polarized image Specimen shown in cross-polarized image


NOTE: Quarry locations are approximate.

Colorado Yule Quarry
County Road 3C
81623 Gunnison , Colorado
United States
39° 2' 32.964" N, 107° 10' 15.276" W
Colorado US

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