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Nuummite Gemstone Information

Nuummite Gemstones from GemSelect - Large Image

About Nuummite - History and Introduction

Nuummite is the trade name for a rare black gemstone with flecks that show an iridescent play of color. It is a metamorphic rock, which means that it is formed as a result of the transformation of existing rock. The main constituents of Nuummite are gedrite and anthophyllite, with lesser amounts of pyrite, pyrrhotine and chalcopyrite. Nuummite's iridescent play of color is due to its lamellar, fibrous structure (alternating fibrous layers). Nuummite was discovered in the early 1980s, so it is a fairly new gemstone. Its name means "from Nuuk", because it was found in the Nuuk region of Greenland. Although Nuummite was only recently discovered, it was formed more than three billion years ago, so it is also known as the oldest rock on earth.

Nuummite Gemstone

Identifying Nuummite

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Nuummite is quite a unique gemstone and can be recognized by its dark body color interspersed by iridescent flecks that give it its play of color.

Nuummite; Origin and Gemstone Sources

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Nuummite is found in the Nuuk region of West Greenland.

Buying Nuummite and Determining Nuummite Gemstone Value

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Nuummite Color

Nuummite is light-gray to almost black with flecks of iridescent color ranging from yellow to golden, green to metallic blue, and reddish to violet. The flecks can range in size from a few millimetres long to several centimetres long. It is rare for one gemstone to exhibit the full range of colors. Most gemstones display one or two similar iridescent colors.

Nuummite Clarity and Luster

Nuummite is an opaque material which exhibits a vitreous to glossy lustre when polished. Material that occurs near the surface of the deposit can have small cracks, but good quality Nuummite will be free from cracks.

Nuummite Cut and Shape

Nuummite is usually cut en cabochon to maximize the iridescent play of color. It is also fashioned into fancy shapes. Lapidarists must orient Nuummite carefully in order to achieve the best iridescence.

Nuummite Treatment

Nuummite is not known to be treated or enhanced in any way.

Nuummite Gemological Properties:

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Chemical Formula: (Mg2)(Mg5)Si8O22(OH)2
Crystal Structure: Orthorhombic
Color: Light-gray to almost black with iridescent yellow, blue, red, green, gold and violet flecks
Hardness: 5.5 - 6 on the Mohs scale
Refractive Index: 1.598 - 1.697
Density: 3.18 to 3.37
Cleavage: Perfect
Transparency: Opaque
Double Refraction or Birefringence: 0.022
Luster: Vitreous/glossy
Fluorescence: Dark-violet

Please refer to our Gemstone Glossary for details of gemology-related terms.

Nuummite: Related or Similar Gemstones

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Darkly colored gemstones that contain flecks of pyrite or mica can appear similar to Nuummite. Dark larvikite has a similar appearance to Nuummite. Nuummite is chemically related to orthorhombic amphiboles, which also contain anthophyllite.


Nuummite Gemstone Mythology, Metaphysical and Alternative Crystal Healing Powers

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Nuummite is said to be the oldest rock on earth and it has been called the Sorcerer's Stone because it is said to be able to unlock the magic within the individual and bring forth inner power. Nuummite is believed to bring energy to its wearer and to prevent fatigue and stress. Additionally, it is attributed with the ability to stimulate circulation and provide protection. In traditional Indian belief systems, Nuummite is said to activate the root chakra, which is associated with energy.

Disclaimer: Metaphysical and Alternative Crystal Healing Powers and Properties are not to be taken as confirmed advice. Traditional, Ceremonial and Mythological Gemstone Lore is collected from various resources and does not represent the sole opinion of SETT Co., Ltd. This information is not to replace the advice of your doctor. Should you have any medical conditions, please see a licensed medical practitioner. GemSelect does not guarantee any claims or statements of healing or astrological birthstone powers and cannot be held liable under any circumstances.

Nuummite Gemstone and Jewelry Design Ideas

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Nuummite is often set in silver and made into pendants or earrings. It is also used for rings, usually in protective bezel settings. Nuummite can also be wire-wrapped or drilled to make attractive pendants, earrings or beads. The deep color of Nuummite makes it a suitable gemstone for both ladies' and men's jewelry.

Note: Buy colored gemstones by size and not by carat weight. Colored stones vary in size-to-weight ratio. Some stones are larger and others are smaller than diamonds by weight in comparison.

Nuummite Gemstone Jewelry Care and Cleaning

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How to clean your gemstonesNuummite gemstones are quite tough and durable. To clean your Nuummite, simply use warm soapy water and a soft cloth. Be sure to rinse well to remove soapy residue. As with most gemstones, ultrasonic cleaners and steamers are not recommended. Always remove any jewelry or gemstones before exercising, cleaning or engaging in harsh physical activities such as sport. Store Nuummite gemstones away from other gemstones to avoid scratches. It is best to wrap gemstones in soft cloth or place them inside a fabric-lined jewelry box.

  • First Published: February-28-2014
  • Last Updated: January-17-2019
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