BETA

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Verde Cavendish

Submitted by Ed FitzGerald on Mon, 2014-11-24 10:35
Stone Type (Commercial): 
Description: 

Dark green marble with white veins. A true serpentine with extreme hardness.

Availability: 
Available
Physical Data
Absorption (%): 
0.05
Density (lb/cf): 
168.00
Flexural Strength, Dry (psi): 
4,178
Modulus of Rupture, Dry (psi): 
3,137
Compressive Strength, Dry (psi): 
41,771
Bulk Specific Gravity: 
2.69
Abrasion Resistance: 
107.66
Geology
Stone Type (Lithologic): 
Grain Shape: 
Angular
Grain Size: 
Fine
Petrographic Description: 

Specimen: 2014-070-1
This sample is a serpentinite, also known as verde antique or opicalcite, but non-brecciated. The rock usually forms from hydrothermal alteration of ultrabasic rocks. The fabric of the rock is overwhelmingly serpentine group minerals. Most of the rock displays mesh fabric, which is likely predominantly lizardite. This mineral and texture typically forms through the replacement of olivine. Approximately 5 to 10 percent of slide area is occupied by opaque minerals, likely magnetite. This mineral appears both as diffuse aggregates and along veins. Opaque minerals in veins are inter-grown with serpentine mineral species that formed perpendicular to vein walls. These veins are up to .75 mm in width and run up to the width of the slide. Other minerals included in these veins are carbonate, likely calcite, and other species of serpentine with ribbon texture, likely antigorite or chrysolite, that formed parallel to vein walls. The variable chemical and textural qualities of the veins suggest multiple events of hydrothermal alteration. Calcite present in these veins has consertal boundaries and a maximum crystal size of .4 mm. Calcite occupies approximately 5 to 10 percent of total slide area. Similar veining is visible in the hand sample at a larger scale.
MP 9/4/2015

Specimen: 2014-070-2
This sample is a serpentinite, also known as verde antique or opicalcite, but non-brecciated. The rock usually forms from hydrothermal alteration of ultrabasic rocks. The fabric of the rock is overwhelmingly serpentine group minerals. Most of the rock displays mesh fabric, which is likely predominantly lizardite. This mineral and texture typically forms through the replacement of olivine. Approximately 5 percent of slide area is occupied by opaque minerals, likely magnetite. This mineral appears both as diffuse aggregates and along veins. Opaque minerals in veins are inter-grown with serpentine mineral species of variable habit, orientation, and likely chemical composition. These veins are up to .6 mm in width and run up to the width of the slide. Other minerals included in these veins are carbonate, likely calcite, and other species of serpentine, some with distinct ribbon texture, likely antigorite or chrysolite. Calcite present in these veins is mostly micro-crystalline. Calcite occupies only about 1 percent of total slide area. Similar veining is visible in the hand sample at a larger scale.
MP 9/4/2015

Images

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Specimen ID
2014-070-1 Image of specimen in dry conditions. Finish: Polisheddownload image
2014-070-2 Image of specimen in dry conditions. Finish: Honeddownload image

Thin Sections

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Specimen ID Non-polarized Cross-polarized
2014-070-1 Specimen shown in non-polarized light.download image Specimen shown in cross-polarized light.download image
2014-070-2 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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