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Entry № 159

Glendonite

Calcite Pseudomorph after Ikaite

A star of calcite where a cold-water mineral once grew.

Chakra

Crown · Third Eye

Element

Water · Earth

Zodiac

Scorpio · Pisces

Glendonite

I. The Metaphysical Reading

How the stone has been held.

Glendonite is worked with as a stone of preserved memory, kept in the studio during ancestral work, grief practice and any ritual that holds the shape of what is no longer here. Practitioners hold it as a reminder that a form can outlast the substance that first held it.

Chakra
Crown · Third Eye
Element
Water · Earth
Zodiac
Scorpio · Pisces
Keynote
A star of calcite where a cold-water mineral once grew.

II. The Scientific Reading

What the lattice actually does.

Glendonite is a calcite pseudomorph after ikaite (CaCO₃·6H₂O), a hydrated calcium carbonate that only crystallises at temperatures near freezing. As sediments warm, ikaite decomposes and calcite grows in its place, preserving the original star-shaped habit. Glendonites are important palaeoclimate indicators for cold marine bottom-water conditions.

Formula
CaCO₃ (after CaCO₃·6H₂O)
System
Trigonal (pseudomorphous after monoclinic)
Hardness
3 (Mohs)
Provenance
Russia (White Sea, Olenitsa River), Australia (New South Wales — Glendon, type locality), Denmark (Greenland)

References & Sources

Independent mineralogical references used to verify the scientific details above.

Mineral Profile

Fact Sheet

Chemical Formula
CaCO₃ (after CaCO₃·6H₂O)
Crystal System
Trigonal (pseudomorphous after monoclinic)
Mohs Hardness
3 (Mohs)
Density
2.71 g/cm³
Refractive Index
1.486 – 1.658
Provenance
Russia (White Sea, Olenitsa River), Australia (New South Wales — Glendon, type locality), Denmark (Greenland)
Color Origin
Pale beige to cream stellate crystal clusters with radiating pyramidal habit

Related Crystals

Stones that share this lattice

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Next in the Atlas

Goethite

The rust that made the ochres of the first painters.