Tugtupite Value, Price, and Jewelry Information

view gemstone encyclopedia

Tugtupite cabochon, exposed to UV light, 5.02 cts, 17.1 x 12 mm, Narsaq, Greenland. © The Gem Trader. Used with permission.

Gem collectors prize tugtupite, the “Reindeer Stone,” for its rich colors and intense reaction to ultraviolet light. Sporadically used in jewelry, clean, faceted tugtupites are great rarities.

Tugtupite Information

Data Value
Name Tugtupite
Crystallography Tetragonal. Only occurs in massive and compact form.
Refractive Index 1.496-1.502
Colors White to pink, rose red, greenish; mottled. Rarely, light blue.
Luster Vitreous to greasy
Hardness 4-6.5 reported
Fracture Conchoidal
Specific Gravity 2.11-2.57
Birefringence 0.006-0.008
Cleavage Distinct
Luminescence Very distinctive rose-red color. Generally redder in SW than LW. See "Identifying Characteristics" below.
Luminescence Present Yes
Luminescence Type Fluorescent, UV-Long, UV-Short
Transparency Opaque to translucent
Phenomena Tenebrescence
Formula Na4AlBeSi4O12Cl.
Pleochroism Strong: bluish-red/orange-red
Optics Optics: o = 1.496; e = 1.502. Uniaxial (+) or (-). May be anomalously biaxial with 2V from 0° to 10°.
Optic Sign Uniaxial +, Uniaxial -
Etymology After the type locality, Tugtup agtakôrfia Ilimaussaq. Tugtup means “reindeer” in the Greenlandic Inuit language.
Occurrence Hydrothermal veins in nepheline syenite pegmatite.
Inclusions Usually included.
tugtupite - rough

Tugtupite: Ilimaussaq, Greenland (specimen ~ 1 inch across). Photo © Joel E. Arem, PhD, FGA. Used with permission.

What is Tugtupite?

Discovered in 1960, tugtupites are relatively recent entries into the gem world. A member of the helvine mineral group, tugtupite is also closely related to sodalite.

You may find this mineral referred to as “Reindeer Stone,” after the type locality. Tugtup means “reindeer” in the Greenlandic Inuit language. (Perhaps the gem’s similarity to a certain famous reindeer’s nose has also reinforced that moniker).

Do Tugtupites Glow in the Dark?

This gemstone displays striking phosphorescence and tenebrescence. Exposure to ultraviolet (UV) light, whether from artificial sources or sunlight, intensifies its colors, generally making it darker and redder. X-rays also darken paler colors. On the other hand, darkness will cause its red colors to fade. These effects are reversible.

Tugtupites can even glow in the dark after UV exposure. See “Identifying Characteristics” for more more information.

tugtupites rough and cut - UV exposed comparison

UV-exposed tugtupite inlay next to a piece of the unexposed rough it came from. Note the difference in color. Photo by Jessa and Mark Anderson. Licensed under CC By 2.0.

Does Tugtupite Make a Good Jewelry Stone?

faceted tugtupite - oval

Faceted, oval-cut tugtupite: Ilimaussaq, Greenland. (Oval cut, 0.51). Photo © Joel E. Arem, PhD, FGA. Used with permission.

The hardness of tugtupites can range from 4 to 6.5. On the softer end, a knife could scratch one. On the harder end, a specimen could exceed the hardness of more commonly encountered jewelry stones, such as feldspars. However, their distinct cleavage makes these stones better suited for pendants and earrings. Protective settings are recommended for ring use. Of course, owners should be aware of this stone’s sensitivity to UV and darkness.

Moving beyond a mineral collection, these gems could make interesting Christmas jewelry pieces or glow-in-the-dark fashion statements. However, tugtupite’s abundance has declined in the years since its discovery. Thus, it’s become somewhat hard to obtain, especially in cuttable pieces.

Faceted pieces are extremely rare. Tugtupites are more typically cut into cabochons.

Identifying Characteristics


Very distinctive rose-red color. Generally redder in shortwave (SW) than longwave (LW).

  • Taseq, Greenland: SW, pastel orange-red; LW, bright orange: phosphoresces bright cream or orange-cream, better reaction in SW than LW.
  • Kvanefield, Greenland: LW, bright orange to orange- red; SW, cerise red, and very intense; phosphoresces dull red to medium cream white.

The material darkens in color when exposed to UV light and slowly bleaches.

A tugtupite and quartz piece under normal light, then exposed to ultraviolet light. Kvanefjeld plateau, Qeqertaussaq Island, Kangerdluarssuq Firth, Ilimaussaq complex, Narsaq, Kitaa (West Greenland) Province, Greenland. Photos by Géry Parent. Licensed under CC By-ND 2.0. (Slide show created to highlight fluorescence).


If placed under pressure, tugtupite can generate an electrical charge.

Are There Synthetic Tugtupites?

Scientists have created synthetic analogues for this mineral. However, no commercial jewelry use for these synthetics is known.

Where are Tugtupites Found?

Almost all gem-quality material comes from the Taseq and Kvanefield areas of Tugtup, Ilimaussaq, Greenland.

There are only two other known sources of this rare mineral:

  • Mont Saint-Hilaire, Quebec, Canada.
  • Kola Peninsula, Russia.

Stone Sizes

Gem cutters have only faceted a few gems, all very small and none completely transparent. Typical gem size ranges from 1 to 2 carats. While cutters can facet translucent material, they usually cab such pieces. After the initial discovery, gem carvers made decorative objects from some of the larger tugtupites.

Caring for Tugtupite Gemstones

Store these gems separately from other harder stones such as quartz or topaz to avoid contact scratches. For cleaning, use a soft brush, mild detergent, and warm water. Avoid mechanical cleaning. Consult our gemstone jewelry cleaning guide for more recommendations.

cufflinks - tugtupites

18K white gold cufflinks with tugtupite cabochons. Photo courtesy of liveauctioneers.com and M.D.CHJewelry Co.

Ready to learn how to identify gems on your own?

Join our mailing list below to download a FREE gem ID checklist tutorial. See what’s inside…

• Discover the 17 practical steps to gemstone identification (even if you’re just getting started with gemology)

• Learn how you can use specific tools to gather data, make observations & arrive at an accurate ID

• Explore a range of gemological tests… not only will you get familiar with the process but also time-saving shortcuts!