Tugtupite – origin, colour, and characteristics

Tugtupite is one of the most sought-after Greenlandic minerals. The name comes from the Greenlandic word for reindeer, tuttu, hence it is also known as reindeer bloodstone. It was described in the late 1950s from the Ilímaussaq complex in South Greenland and is known for a rare optical phenomenon: its colour intensifies when exposed to daylight or UV light.

What You Should Know About Tugtupite

Facts, stories, and tradition: We differentiate between documented geology, local folklore, and modern spiritual interpretations.

Fact-based reference knowledge: Origin, mineralogy, colour, and hardness in one place – written for jewellery makers and collectors.

Greenlandic stones in stock: We sell Tugtupite, Nuummite, Kakortokite, Greenlandic rubies, and finished jewellery online and at our shop at Nybrovej 83 in Gentofte.

What is Tenebrescence?

Tenebrescence is a reversible colour change: the mineral darkens when exposed to daylight or UV light and slowly returns to a lighter colour in darkness. This effect is due to structural defects in the crystal lattice that temporarily trap electrons, and it can be repeated many times.

It is precisely this property that makes Tugtupite so well-known among collectors. A stone that appears pale pink in a display case can become distinctly red after exposure to sunlight.

From Reindeer Blood to a Stone Awakened by Light

Tugtupite was discovered by geologist Henning Sørensen in 1957 and is named after its discovery site, Tugtup Agtakôrfia near Narsaq. The place name is linked to the Greenlandic 'tuttu' (reindeer), and the stone's pink and dark red tones later inspired the name 'reindeer blood stone'.

A local tale from the Narsaq area describes red marks in the mountains turning into stones after a woman gave birth in secret. This story exists in various modern retellings, but its origin as an ancient Inuit legend is not documented. Therefore, we present it as a local oral tradition – not as a historical fact.

What's special is that natural science almost adds to the story: Tugtupite can become a stronger pink or red in sunlight and UV and slowly fade again in darkness. This reversible colour change is called tenebrescence. Thus, a pale stone can appear to 'awaken' when brought into the sun.

Tugtupite in Modern Spirituality

In modern crystal communities, Tugtupite is often referred to as a heart crystal. Proponents associate it with love, passion, self-love, forgiveness, and emotional openness, among other qualities. Its colour and changes in light are used here as a symbol that something hidden can emerge and find new life.

These are spiritual interpretations and not scientifically documented properties. A stone may have personal or ritual significance to an individual, but it cannot replace medical or psychological treatment.

Where does the stone come from?

Tugtupite was discovered and described in the Ilímaussaq complex in South Greenland, an alkaline intrusive complex known for its unusually rich mineral content. The area has given its name to several minerals not described in many other places in the world.

The mineral has since been found in similar alkaline environments outside Greenland, but Greenlandic material remains the best known in trade.

Characteristics of genuine material

  • The colour is rarely uniform – typically, pink areas are seen within a lighter or greyish matrix.
  • The effect can be tested: place the stone in sunlight for a few minutes and compare it with a photo taken beforehand.
  • The surface is softer than quartz, so polished surfaces may show fine scratches with use.
  • The seller should be able to state the origin; rare stones without provenance are a red flag.

Buy Greenlandic stones at Tomato

This page is written as reference knowledge for jewellery makers and collectors: what the stone is geologically, where it comes from, what it looks like, and what to be aware of regarding processing and authenticity.

We stock Greenlandic stones and finished jewellery made with them. You can find Tugtupite, Nuummite, Kakortokite, and raw Greenlandic Rubies under Greenlandic Gemstones – available to buy online and view in our Gentofte store.

FAQ

Why does Tugtupite change colour?

Due to tenebrescence: light temporarily changes the electron distribution in the crystal lattice, deepening the colour. In darkness, the colour gradually returns. The effect is reversible.

How hard is Tugtupite?

Typically around 4-6 on the Mohs scale, meaning it's softer than quartz. It is best suited for pendants, brooches, and earrings rather than rings, which are exposed to wear.

Is Tugtupite only found in Greenland?

No, the mineral has also been found in similar alkaline rocks in Russia and Canada, among other places, but the Greenlandic material from Ilímaussaq is the most well-known.