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Madagascar Septarian Calcite half nodule mounted on a custom acrylic base
$790
£607.72
€705.39
CA$1,114.09
A$1,247.97
CHF 655.48
MX$15,174.87
NOK 8,300.48
SEK 7,879.39
DKK 5,264.60
About the Item
Septarian Calcite Half Nodule
Madagascar
Mounted on Custom Acrylic Base
This polished half-nodule reveals the striking internal structure of a Septarian concretion from Madagascar, composed primarily of golden calcite, aragonite, and sedimentary matrix. Formed over millions of years, septarian nodules are the result of volcanic activity and mineral sedimentation, with internal cracking patterns (called “septaria”) filled in by secondary crystal growth.
This particular specimen displays a rich mosaic of honey-colored calcite veins against an earthy, cracked matrix—offering a compelling visual contrast between crystalline geometry and organic formation. The half-nodule has been expertly cut and polished to highlight these natural patterns, creating a sculptural cross-section of deep geological time.
Mounted on a custom-designed clear acrylic base, the piece achieves a clean, floating presentation that emphasizes its symmetry and texture. Equal parts natural history specimen and contemporary object, it is ideal for collectors, interior spaces, or educational displays exploring the intersection of art and Earth science.
Provenance:
Origin: Madagascar
Material: Septarian Nodule (Calcite, Aragonite, Limestone Matrix)
Mount: Custom acrylic base with gallery-standard support
Features: Polished half-nodule with visible crystal structure and septarian patterning
- Creator:Pietra Gallery (Workshop/Studio)
- Dimensions:Height: 9.45 in (24 cm)Width: 8.27 in (21 cm)Depth: 3.55 in (9 cm)
- Style:Organic Modern (In the Style Of)
- Materials and Techniques:
- Place of Origin:
- Period:
- Date of Manufacture:2025
- Production Type:New & Custom(One of a Kind)
- Estimated Production Time:Available Now
- Condition:
- Seller Location:Polanco, MX
- Reference Number:Seller: SPCA-24100415031stDibs: LU2520345450442
PIETRA GALLERY LLC
Established in 2008 in the heart of Polanco, Mexico City, Pietra Gallery first gained a reputation as a leading global dealer in fossils and minerals. Working with unconventional elements, sourced from uninhabitable deserts, tropical islands, snow-capped mountaintops and Nordic forests, the gallery’s range now includes unique pieces of furniture, lighting, art objets, homeware and exclusive artworks incorporating these rare discoveries.
Representing an elite group of international artists and designers, Pietra Gallery has become a pioneer in redefining how Earth’s formations can be repurposed into functional items and artworks for a contemporary home.
About the Seller
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