Nuummite Tumble (B)

What is Nuummite?

Nuummite is a rare iridescent metamorphic rock from the Nuuk region of Greenland. Rather than being a single mineral, genuine Nuummite is composed mainly of amphibole minerals, particularly from the anthophyllite–gedrite series, which create its distinctive internal flashes.

The name Nuummite means “from Nuuk,” referring to the area in Greenland where this material was first recognised and later introduced to the gemstone trade. Authentic Greenland Nuummite is highly sought after because true material is difficult to source, and many lookalike stones are incorrectly sold under the same name.

Its dark charcoal to black base is often accented by golden, bronze, coppery, or blue iridescent flashes that appear when the stone is moved in light. These flashes are not surface treatments, but natural optical effects created by the mineral structure within the rock.

This is genuine Nuummite from Nuuk, Greenland. Although this is B grade material, it is still authentic and remains a special collector stone due to its rarity, origin, and ancient geological history. Please see my blog to learn more about the difference between genuine and fake Nuummite.