help need id

[geo4472]

i tried this post in rocks and gems here but no help so here we go anyone know what mineral this is and what it is worth?

 

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[BioProfessor]

For an ID of a mineral, it would really help if you can get a nice closeup of the crystals. That is about the only way to tell what it is.

Daryl

 

[Mackaydon]

It would also help to see a scale of the sample---like a dime or ruler next to the rock. What is the geology of the surrounding matrix?

 

[geo4472]

here are some more pics there used to be alot of trap rock minning in the area and it was found in a basalt formation

 

[Angelo]

It may be OLIVINE.

Check this out:

http://www.windows.ucar.edu/tour/link=/earth/geology/min_olivene.html

Tony

 

[geo4472]

the pic i took is a little deceiving the crysrals are white not green so it cant be olivine

 

[Mackaydon]

Martin A. Becker is an assistant professor of geology in the Department of Physics at the College of New Jersey in Ewing. Paraphrasing from his book, 'Rocks and Minerals' he wrote:

The Millington quarry in Somerset County, NJ, can provide collectors with a varied selection of trap-rock minerals. Anhydrite, chalcedony, quartz, datolite, apophyllite, prehnite and zeolite.. The tops of zone three and zone two contain the majority of prehnite, zeolites and calcite.

Cummings (1985) compiled a list of twenty-four minerals occurring in Millington quarry and identified apophyllite, analcime, natrolite, and iron sulfides to be the most abundant. In contrast, Becker's experiences in the quarry identify prehnite, apophyllite, datolite, and calcite as the most commonly occurring minerals in all four zones.

I add the following because of your 'Paterson' connection.
"The reputation of the more famous Paterson and Prospect Park localities for producing fine trap-rock mineral specimens is one that has been established for more than one hundred years (e.g., Peters 1984; Peters, Peters, and Weber 1978). In contrast, Millington quarry offers collectors current and exciting alternative assemblages of trap-rock minerals that differ in color, luster, and crystal habit from their more famous counterparts.

Hopefully, this will narrow the number of choices. You might just submit a pic of your sample via email to Becker.

Let us know. Don.....

 

[bakergeol]

Usually photos are not enough. However does look like quartz crystals. Should be hard and will scratch steel. Calcite crystals are soft and can not scratch steel- also will fizz in dilute HCL.

George

 

[chipveres]

Quartz crystals should have a hexagonal (six-sided) shape. I can't see the picture well enough to see if this does?

Chip V.

 

[Carson Coin Master]

some type of geode but i cant tell by the pictures