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Manganocalcite

This page is still under construction. Please revisit the page again in a week. The gemstone quality standard will be online soon. 

About Manganocalcite

Manganoan calcite or manganocalcite is a variety of calcite being rich in manganese, which gives the mineral a pink color.

The most fascinating thing about this stone is that it is fluorescent. Put under ultraviolet light the stone emits a strong purple/orange glow.

Read more about fluorescent stones from Peru:

Important 2024 Update:

So far, there has been only one mine for manganocalcite in Peru. The manganocalcite vein was very thin (max 6 cm thick) and did only allow for small spheres and other objects.

Over the last couple of years, we noted the quality of the material getting worse and worse. It showed less fluorescence, more white chalky contents, holes, and black impurities as well as less good color. At the same time, the provider did increase prices constantly. All this is a clear sign of a mineral vein being fully exploited and disappearing.

Now we have good news. We found a new vein of manganocalcite and we will have now exclusive access to new top-quality material with super fluorescence, great banded color, without chalky parts or black impurities, and no porous material full of holes.

And the best of all. The material comes in huge chunks. For the first time ever you will be able to order big towers, spheres, and other decor objects made in manganocalcite. 

Is there anything you wish to know about:

Shipping cost and logistics, Payment options, Product quality, Packaging, Shipping damage, Refunds, etc. ?

Rarity

Even though it occurs in Europe, Lybia, Egypt, and Mexico, the largest deposits are in Peru. It is not a rare stone.

Color

Angelite is a glacier-blue or lilac-blue-colored stone.

Color intensity:

In the Angelite mines, one can buy a whitish, pale blue version of Angelite at a cheaper price. This pale material is not adequate for jewelry. Jewelry-grade Angelite displays a more intense blue and can be acquired from mines at a higher price.

Uniformity of color:

Angelite generally displays a uniform coloration with very few color shades.

Impurities

Angelite shows white and brown impurities. White impurities are gypsum. Gypsum impurities appear as tiny white flecks or as massive lines of gypsum penetrating the stone along microcracks in the material. Most likely those cracks opened the way for water to penetrate the stone, which hydrated the cracks and initiated the Angelites’ deterioration into gypsum along those cracks.

The reddish-brown impurities penetrate a great part of the Angelite volume in a similar pattern to the gypsum lines.

Gypsum lines and brownish impurities render more than 75 % of the Angelite unsuitable for jewelry.

Angelite with just a few tiny white gypsum flecks may be used for economy jewelry at a lower price level. However, less than 20 percent of the Angelite rough rock material acquired in the mine is free of impurities and suitable for top-quality jewelry.

In order to obtain this material the nodes must be cut open and all unsuitable material must be cut away. In order to obtain 1 kilo of jewelry-grade material we are buying 5 kilos of rough rock and discard 4 kilos on average.

Polishable

When polishing Angelite Gemrock cutters do NOT follow the regular steps of increasingly finer diamond wheels from 600 to 3000 grit. Maximum polish can be obtained by polishing to 1200 grit and then adding a different polishing method, developed by us, which makes a by far superior polished surface pop out.

Cutting Quality

Challenges:

Angelite is a very soft material. Cutting it requires the application of very little pressure against the shaping and polishing wheels. Cutting small cabs from this soft material becomes more difficult the smaller the required cab is. Inexperienced cutters will most likely deform the cab.

Advantages:

Angelite does not tend to break or chip. Experienced cutters therefore can obtain very sharp unchipped edges between the backside and bezel as well as between the bezel and dome.

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

Be aware of wrongfull quality grading

It’s commonplace in the crystal industry to cut cheap cabochons from any kind of Angelite without applying any kind of grading for high-quality material. Frecuently you can find cabochons made from completely unsuitable material full of brown and white impurities. Unscrupulous dealers take advantage of the lack of knowledge of crystal shops, jewelers, and final clients and market such low-grade and even trashy material as Tripple A top-grade material.

Pricing

Adequate pricing must take into account the cost factors to obtain top-quality cabochons:

  • Acquisition of top-grade Angelite with strong color in the mine.
  • Selection of material without impurities and discarding more than 80 percent of the rough rock as unsuitable for jewelry.
  • A usual material loss of approximately 90 % of the selected material during the cutting and shaping process.
  • The level of experience required by a cutter to produce a flawlessly shaped and highly polished cabochon from such a soft material.
Manganocalcite sphere under UV-light
luorescent manganocalcite moon at daylight
fluorescent manganocalite hearts under UV-light
fluorescent manganocalite hearts under UV-light
fluorescent manganocalite hearts under UV-light
Manganocalcite tumbled
fluorescentmanganocalcite moon under UV-light
Manganocalcite sphere with drusis
Manganocalcite sphere with drusis
Manganocalcite sphere with drusis
Manganocalcite sphere with drusis
Manganocalcite sphere
fluorescentmanganocalcite under UV-light
fluorescent manganocalite hearts under daylight
Manganocalcite sphere with drusis under UV-light
Manganocalcite sphere with drusis under UV-light
Manganocalcite sphere with drusis under UV-light
luorescent manganocalcite moon at daylight
Manganocalcite sphere
fluorescent manganocalite hearts under daylight
Manganocalcite sphere with drusis
Manganocalcite tumbled
Manganocalcite tumbled
Manganocalcite tumbled
Manganocalcite tumbled
fluorescentmanganocalcite moon under UV-light
Manganocalcite sphere under UV-light
fluorescent manganocalite hearts under UV-light
Manganocalcite sphere with drusis under UV-light
fluorescent manganocalcite under UV-light
fluorescent manganocalcite under UV-light
fluorescent manganocalcite under UV-light
fluorescent manganocalcite under UV-light

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Our Sustainability Report 2021

Know more about what we achieved, what we struggle with and how you can help:

Products made with Manganocalcite

Click on links to see the product types

Cutting services

Do you need reliable high-quality cutting services for a reasonable price?  Are you looking for a service provider that is willing to develop new products according to your requirements? Would you like to get expert advice in order to improve your product? Do you wish for someone to optimize the process and get the most out of your rough? Just talk to us.

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+51 994104206

gemrockinternational@gmail.com

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