This is a beautiful, fully natural specimen of Martite — hematite that has chemically replaced an original magnetite crystal while faithfully preserving its outward crystal form — sharply embedded in a matrix of bright yellow-green Lizardite. The crystal faces are well developed, allowing the geometry of the original octahedral magnetite form to be clearly appreciated, with a lustrous, dark metallic surface that contrasts vividly against the glossy, waxy yellow serpentine matrix surrounding it.

The specimen comes from the Øvre Dypingdal Mine, part of the Dypingdal serpentine-magnesite deposit near Snarum, in the Modum district of Buskerud, Norway. This large open-pit mine, active since at least the early 20th century, is now abandoned, which makes fresh, well-formed material from this classic Norwegian locality increasingly difficult to find on today's market. The deposit is specifically renowned among mineral collectors for producing exactly this kind of association: sharp, well-formed iron oxide crystals set directly into a serpentine host rock.

The piece combines strong aesthetic appeal with genuine mineralogical interest, making it a fitting addition to a systematic or locality-focused collection, as well as an eye-catching display piece thanks to the harmonious growth of the crystals and the richness of its color contrast.

This specimen combines two very different minerals in a single piece. The black, metallic crystals are Martite, the name given to hematite (Fe2O3) when it occurs as a pseudomorph after magnetite (Fe3O4): under conditions of increasing oxygen availability, iron in the original magnetite crystal is chemically reorganized into the hematite structure, while the outward shape of the crystal — typically octahedral, inherited from magnetite's cubic symmetry — is preserved. The dark, almost black color and strong metallic luster of these crystals are due to the dense concentration of Fe3+ iron in the hematite crystal lattice.

The bright yellow-green matrix is Lizardite, a hydrous magnesium silicate of the serpentine group, formed through the low-temperature alteration of magnesium-rich minerals such as olivine and pyroxene in ultramafic rocks — a process entirely consistent with the serpentine-magnesite geology of the Dypingdal deposit. Its yellow-green color is caused by trace iron and nickel substituting within its sheet-silicate structure, along with fine-grained textural effects typical of massive serpentine minerals.

The Øvre Dypingdal Mine, an open-pit operation in the Modum district of Buskerud, Norway, is now abandoned, and is specifically known among collectors for producing well-formed iron oxide crystals of this kind embedded directly in serpentine matrix.

• Formula: Fe2O3 (Martite, after Magnetite Fe3O4) / Mg3Si2O5(OH)4 (Lizardite)
• Key chemical elements: Iron, Oxygen, Magnesium, Silicon, Hydrogen
• Hardness (Mohs scale): 5.5–6.5 (Martite) / 2.5–3 (Lizardite)
• Mineral class: Oxides (Martite/Hematite group) and Silicates (Lizardite, Serpentine group, Phyllosilicates)
• Crystal system: Trigonal (Martite, after cubic Magnetite) / Monoclinic (Lizardite)
• Crystal habit: Octahedral pseudomorphic crystals on a massive, waxy matrix
• Formation: Oxidative replacement of magnetite by hematite (Martite), within a serpentine-magnesite deposit formed by alteration of ultramafic rock (Lizardite)
• Color: Black, metallic (Martite) / Bright yellow-green (Lizardite)
• Locality status: Abandoned open-pit mine

Lizardite is a serpentine-group mineral often nicknamed "Norwegian jade" in the collecting community because of its smooth, waxy texture and vivid yellow-green tones, which can resemble true jade at a glance despite the two having entirely different compositions.

Martite is not a distinct mineral species but a pseudomorph: it forms when hematite chemically replaces magnetite while preserving the original crystal's external shape, most often the octahedral form typical of magnetite, so a Martite crystal effectively lets you see the outline of a magnetite crystal even though the material inside is now hematite.

The Øvre Dypingdal Mine was worked as a large open-pit operation, documented in photographs dating back to around 1914, and is specifically noted among mineralogists for its well-formed iron oxide crystals embedded in serpentine and hydrotalcite. The mine is no longer active today, adding to the appeal of well-crystallized specimens like this one for collectors seeking material from a classic, no-longer-productive Norwegian locality.

In crystal healing traditions, Martite is regarded much like other iron oxide minerals such as Hematite, believed to promote grounding, physical strength, and a sense of stability, helping to anchor scattered energy and encourage focus and confidence. Lizardite, as a member of the serpentine family, is traditionally associated with calming and balancing energy, believed to support inner transformation, emotional clarity, and a deeper connection to the earth. Together, the dark, grounding presence of Martite and the soft, soothing tone of Lizardite are thought by some to create a harmonious energetic pairing. As with all crystal healing practices, these interpretations are not scientifically proven.

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