Seymchan Pallasite – Large Slice with Widmanstätten Pattern and Translucent Olivines (961 g)

This outstanding 961 g slice of Seymchan represents a rare convergence of metallurgical structure and pallasitic composition, offering a complete and highly instructive view of this fascinating meteorite.

The metallic areas of the slice display clearly defined Widmanstätten patterns, revealed through careful etching. These geometric intergrowths of kamacite and taenite form over extremely slow cooling rates—on the order of only a few degrees per million years—within the core of a differentiated parent body. Their presence is a direct record of deep planetary processes and long-term thermal evolution within an asteroid.

Interspersed within this metallic framework are numerous olivine crystals, exhibiting warm golden to amber translucency. These silicate inclusions create a striking contrast with the structured metallic background, both visually and compositionally.

What makes this specimen particularly remarkable is the coexistence and balance between these two domains:

• the ordered, crystalline geometry of the Widmanstätten pattern
• the natural, irregular distribution of olivine grains

This duality gives the slice both a scientific depth and a strong visual identity.

The size of the specimen further enhances its impact, allowing for a broad and continuous observation of both structures. Large Seymchan slices showing well-developed Widmanstätten figures alongside abundant olivines are relatively uncommon, especially in such a well-prepared and legible format.

This piece is ideally suited for advanced collectors, educational display, or anyone seeking a specimen that clearly illustrates the transition between metallic core material and silicate-rich zones within differentiated planetary bodies.