PYRRHOTITE with SPINEL and CALCITE, Lime Crest Quarry Sparta New Jersey USA (small cabinet)
69 45 38 134
$285.00
Sale price
$285.00
Regular price
Skip to product information
PYRRHOTITE with SPINEL and CALCITE, Lime Crest Quarry Sparta New Jersey USA (small cabinet)
$285.00
Sale price
$285.00
Regular price
Shipping calculated at checkout.
Pyrrhotite, derived from the Greek word for "flame-colored," is an uncommon iron sulfide mineral represented by the formula Fe(1-x)S, where x ranges from 0 to 0.125. This mineral is a nonstoichiometric form of FeS, commonly referred to as troilite. Often called magnetic pyrite due to its color resemblance to pyrite, pyrrhotite exhibits weak magnetism that diminishes with increasing iron content, while troilite remains non-magnetic. Typically, pyrrhotite appears tabular with a brassy or bronze hue and a metallic sheen. It is commonly found in association with mafic igneous rocks such as norites and can form from the alteration of pyrite during metamorphic events.
Spinel is a mineral belonging to the magnesium/aluminium category within the broader spinel group, characterized by the chemical formula MgAl2O4 and forming in a cubic crystal system. The term "spinel" is derived from the Latin word "spinella," which means little thorn, reflecting the mineral's sharp crystal points.
Spinel exhibits isometric crystallization, with octahedral shapes being the most common, often appearing in twinned formations. While it lacks true cleavage, it displays octahedral parting and conchoidal fractures. With a hardness rating of 8 and a specific gravity ranging from 3.5 to 4.1, spinel can be found in a variety of appearances, from transparent to opaque, and possesses a vitreous to dull luster. Its color spectrum includes shades of red, lavender, blue, green, brown, black, and yellow, with chromium(III) being responsible for the red hues found in Burmese spinel.
Former collection: John Betts, Personally Collected in 1996, collection nr 11688 (comes with original tag)
Shipping & Returns
We strive to process and ship all orders in a timely manner, working diligently to ensure that your items are on their way to you as soon as possible.
We want every customer to have a great experience shopping with us. If for any reason you’re not completely satisfied with your purchase, please reach out to our team — we’re here to help and will review every return request with care.
If your item arrives damaged, we kindly ask that you provide a short, continuous video showing the specimen from at least six angles. You can simply hold it in your hands and gently rotate it while filming. Please also include a clear view of the package label in the video so we can assist you as quickly as possible.
For all items reported as damaged or broken, we do require the item to be returned to us before a refund can be processed.
Return shipping costs are initially the responsibility of the customer. However, if your claim is approved after review, we will reimburse your reasonable return postage costs.
Our T&C's or policies prevail in case of a disagreement.
Shop The Full Collection
