Coati Aragonite

Gemstone Quality Standard

Fluorescent and phosphorescent Coati Aragonite

About Peruvian Coati Aragonite

Peruvian Coati Aragonite is a banded material showing a beautiful variety of brown/reddish, yellowish, and white layers. It can also be polished to a glass-like surface.

We named it Coati Aragonite because it reminds us of the banded tail of the South American Coatí, a species threatened by extinction. We thought it was a great opportunity to call attention to the plight of this and other species and remind people that protecting our biodiversity is important.

Peruvian Coati Aragonite shows very strong fluorescence and phosphorescence. When put under UV light, some of its bands emit a very bright white light. When the light is switched off, they show a very strong and long-lasting green afterglow.

An amazing material that looks great under natural and UV light, as well as in deco-pieces and jewelry.

drop shaped Master Cabochon made from Coati Aragonite

Color

Coati Aragonite occurs as layered material with bands in shades of brown/reddish, yellowish, and white.

Color intensity:

Jewelry-grade material shows relatively sharp and thin lines with a higher color contrast than regular Coati Aragonite.

Impurities

Coati Aragonite does not come with impurities. As Aragonite is a fibrous material, there might be pores occurring. However, in jewelry grade Coati Aragonite that is very rare and if so, pores are minute in size.

Polishable

Coati Aragonite can be polished to glass-finish.

You can buy our finished top-quality cabochons for jewelry makers.

National and international shipping from our US-based warehouse.

Buy your Coati Aragonite Cabochons here

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Master Cabochon made from Coati Aragonite

Cutting Quality

Challenges:

Coati Aragonite is a soft material. Cutting it requires the application of very little pressure against the shaping and polishing wheels. It can be brittle, which leads to the risk of breakage during the process.

Top-cutting-quality is characterized by:

a polished backside
a sharp unchipped edge between the backside and the bezel
a very straight and even highly polished bezel
a sharp unchipped edge between the bezel and the dome
a well-shaped dome, not showing any deformation
Top-quality polish

Rarity & Availability

Coati Aragonite occurs in one mine in Peru. So far, Gemrock is the only source for Coati Aragonite. We provide:

standard grade rough rock for decor pieces
pre-selected jewelry-grade rough rock for cabochons.
jewelry-grade slabs
cabochons
finished jewelry

You can buy our finished top-quality cabochons for jewelry makers.

National and international shipping from our US-based warehouse.

Buy your Coati Aragonite Cabochons here

Pricing

Jewelry Grade Material:

Layered material with bands in shades of brown/reddish, yellowish, and white. Jewelry-grade material shows relatively sharp and thin lines with a higher color contrast than regular Coati Aragonite.

Cutting Quality:

Straight bezel (minor irregularities possible), 3 mm high
Perfect dome (3-5 mm high)
Edges between bezel and dome, as well as bezel and backside: sharp and crispy, minor chips on lower edge possible
Backside flat at 280 grit, unpolished

Pricing:

Recommended Retail Price: 0.39 USD per carat

Jewelry Grade Material:

Layered material with bands in shades of brown/reddish, yellowish, and white. Jewelry-grade material shows relatively sharp and thin lines with a higher color contrast than regular Coati Aragonite.

Cutting Quality:

Straight bezel, 3 mm high
Flat and perfect dome (3 mm high)
Edges between bezel and dome, as well as bezel and backside: sharp and crispy, minor chips on lower edge possible but very rare.
Backside flat, at 280 grit

Additionally (AA+): Backside polished to 3000 grit

Pricing:

Recommended Retail Price (AA): 0.69 USD per carat

AA+) 0.79 USD/c

Jewelry Grade Material:

Layered material with bands in shades of brown/reddish, yellowish, and white. Jewelry-grade material shows relatively sharp and thin lines with a higher color contrast than regular Coati Aragonite.

Cutting Quality:

Only cut by our best master cutters
Straight bezel, 3 mm high
Flat and perfect dome (1-3 mm high)
The edges between the bezel and dome, as well as the bezel and backside, are sharp and crispy, with no chips on the lower edge.

Additionally (AAA+): Backside flat, polished to 3000 grit

Pricing:

Recommended Retail Price (AAA): 0.99 USD per carat

AAA+: 1.09 USD/c

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