BETA

Appalacian Green

Submitted by Ed FitzGerald on Mon, 2014-11-24 11:00
Trade Name Alias: 
Stone Type (Commercial): 
Description: 

Consistent green veins (compared to Cippolino). 80% of the grade is the green veining with subtle hints of Danby White in the background.

Availability: 
Available
Physical Data
Absorption (%): 
0.08
Density (lb/cf): 
170.40
Flexural Strength, Dry (psi): 
1,854
Modulus of Rupture, Dry (psi): 
2,029
Compressive Strength, Dry (psi): 
8,580
Bulk Specific Gravity: 
2.73
Abrasion Resistance: 
11.30
Geology
Stone Type (Lithologic): 
Grain Shape: 
Angular
Grain Size: 
Medium
Petrographic Description: 

Specimen: 2014-077-1
This sample is a moderately coarse grained marble with a somewhat diverse chemical composition. The texture is overall granoblastic with random grain orientation. Maximum carbonate grain size is about 1.2 mm, minimum is .1 mm, and the modal size is .8 to .4 mm. Grain boundaries are mostly curved or straight with a lesser amount of sutured boundaries. Twin lamellae in carbonates are common. Non-carbonate accessory minerals minimally include quartz, feldspar (albite twinning) amphiboles (richterite, tremolite?), micas (muscovite, phlogopite and others?), sillimanite, opaques, isotropic minerals (periclase?), and low birefringence minerals. The most common are individual and small aggregates of quartz, many reflecting strain induced nucleation. Maximum quartz crystal size is around .4 mm. Most other accessory minerals are present in fine grained ground masses. The small size of most crystals precludes definitive identification of all minerals. Clino- and orthopyroxenes are present in small amounts with maximum dimensions of .4 mm. All non-carbonate accessory minerals constitute about 20 percent of slide area. Preferred orientations of mineral elongation and the morphology of accessory mineral aggregates produces a banding in the thin section. Diffuse banding is also visible in the hand sample. There is no weathering apparent in this sample other than the likely formation of brucite after periclase.
9/4/2015

Specimen: 2014-077-2
This sample is a moderately coarse grained marble. The texture is overall granoblastic with random grain orientation. Maximum carbonate grain size is around 1.1 mm, minimum is .1 mm, the modal size is a wide range between .7 to .4 mm. Grain boundaries are curved, straight, and sutured. Twinning lamellae in carbonates are common. The most common non-carbonate accessory minerals are of quartz and feldspar (albite twinning) that occur as individual crystals and rarely in small aggregates. Individual quartz grains have a maximum dimension of .35 mm; most are significantly smaller. Other minerals are relatively rare, micas (muscovite, phlogopite?) and acicular sillimanite form aggregates in small bands. An orthopyroxene, based on cleavage, birefringence, extinction, and relief is present in small amounts. There are also fine grained, low birefringence minerals that cannot be conclusively identified. All non-carbonate accessory minerals constitute less than 5 percent of slide area. Preferred orientations of mineral elongation and the morphology of accessory mineral aggregates produces a faint banding in the thin section. Diffuse banding is also visible in the hand sample. There is no appreciable weathering visible in the thin section.
9/4/2015

Images

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Specimen ID
2014-077-1 Image of specimen in dry conditions. Finish: Polisheddownload image
2014-077-2 Image of specimen in dry conditions. Finish: Honeddownload image

Thin Sections

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Specimen ID Non-polarized Cross-polarized
2014-077-1 Specimen shown in non-polarized light.download image Specimen shown in cross-polarized light.download image
2014-077-2 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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