Hodgkinsonite

A variety of Minerals

Hodgkinsonite specimen - rock identification

What is Hodgkinsonite?

Hodgkinsonite is a rare zinc manganese silicate mineral Zn2MnSiO4(OH)2. It crystallizes in the monoclinic system and typically forms radiating to acicular prismatic crystals with variable color from pink, yellow-red to deep red. Hodgkinsonite was discovered in 1913 by H. H. Hodgkinson, for whom it is named in Franklin, New Jersey, and it is only found in that area.

Optical Properties

Refractive Index
1.720-1.746
Birefringence
0.026
Pleochroism
Transparent pink stones: lavender and pale purple
Optical Character
Biaxial negative

Hodgkinsonite Market Value Calculator

Estimate the market value of Hodgkinsonite using size, quality, and finish. This preview calculator is for quick context and is not a formal appraisal.

Preview only. Full pricing comps and valuation report in the app.

Hodgkinsonite Localities Map

See where Hodgkinsonite is found with a localities map, collecting zones, and geology context. Generate a sample map preview below.

Map preview
North ZoneCentral RidgeSouth Basin

Interactive map layers and collecting notes are available in the app.

Quick Facts

Physical Properties

Color
Bright pink, red to reddish brown, orange, yellow, black
Hardness (Mohs)
4.5 - 5
Streak
White

Chemical Properties

Chemical Formula
Mn2+Zn2(SiO4)(OH)2
Elements
H, Mn, O, Si, Zn
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