New York the "Empire State"

Jordi Fabre

New York the "Empire State"

To lead the New York State I'm pleased to publish one of the multiple images downloaded by Glenn Rhein in the amazing thread: "New find of minerals from New York" about the recent discovery of a lot of minerals in his property.

Thank you Glenn!

John Jaszczak · Joined: 05 Oct 2010 Posts: 300 Location: Hancock, MI

One of the most interesting occurrences for graphite crystals in new York is the Gouverneur Talc Company #4 quarry (Valentine property) in Harrisville, NY. The marble there hosts a wide variety of graphite morphologies ranging from well-formed tabular hexagonal crystals to spherical aggregates. One particular piece of calcite showed graphite crystals that showed late-stage layer-by-layer growth of graphite (note the growth spirals) overgrowing earlier-formed graphite crystals from the edges toward the center (a,b). The earlier-formed crystals often have a frosty luster (a) but occasionally showed remarkable stellate dendrites (snowflake) patterns on the surface (b-c). Image (d) is of the same crystal as (c) using Nomarski differential interference contrast microscopy. John A. Jaszczak specimens and photos (345-3-4, 345-02, 345-05, 346-04).

rweaver

Former collection of Carnegie Inst. and Del Oswald

rweaver

A very large undamage one on matrix

John S. White

Here is a cute little quartz scepter from Treasure Mtn., Fall Hill, Little Falls, NY.

Doug

The green fluorite is unlike any I ever ran across collecting in Lockport. I grew up in western New York, Hamburg which is south of Lockport, and did a fair amount of collecting at what was then called the Frontier Dolomite Products Quarry. All I ever saw was colorless simple cubes as shown in this photo.

am mizunaka · Joined: 09 Apr 2010 Posts: 2184 Location: USA

A couple for New York.

Jesse Fisher · Joined: 18 Mar 2009 Posts: 639 Location: San Francisco

Fluorite on Dolomite from the Emmons Quarry, Walworth, New York.

Jim Prentiss · Joined: 01 Dec 2009 Posts: 103 Location: Ohio

Hello Everyone,

I have but one mineral from New York to post today.

jimp

alfredo · Site Admin Joined: 30 Jan 2008 Posts: 1011

In case anyone mistakenly thought that New York only has pretty minerals, here is a rare amphibole, fluoropotassichastingsite, from its type locality, the Greenwood mine. I love black minerals with long names.

Luiz Menezes · Joined: 10 Dec 2009 Posts: 140 Location: Belo Horizonte

John:

What is the size of the graphite crystals?

John Jaszczak · Joined: 05 Oct 2010 Posts: 300 Location: Hancock, MI

Dear Luiz-
Sorry that I didn' t put a size. I am embarrassed that I also failed to include the size in the Rocks & Minerals article about them (R&M 84 (2009) 502-519). They crystals are between 1 and 2 mm across.
Thanks!
John

John Jaszczak · Joined: 05 Oct 2010 Posts: 300 Location: Hancock, MI

In addition to well-formed hexagonal single crystals, graphite occurs in spherical aggregates of platy crystals that can be fairly coarse, or very compact. The compact versions probably grow by a different crystal-growth mechanism. Here are examples of each.

Susan Robinson · Joined: 05 Aug 2010 Posts: 163 Location: Hancock, MI

The green fluorite is most likely from either Macomb, New York, or Muskellonge Lake, New York, and not Lockport, NY. My husband and I lived in that region for many years and he collected from the Macomb locality several times when it was accessible.
I hope this information is helpful for you.
Susan Robinson

am mizunaka · Joined: 09 Apr 2010 Posts: 2184 Location: USA

My "duck" head quartz specimen. The calcite has unknown inclusions that might be marcasite.

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