Amakinite
A variety of Minerals
What is Amakinite?
Amakinite is a semi transparent yellow-green hydroxide mineral belonging to the brucite group that was discovered in 1962. Its chemical formula is written as (Fe,Mg)(OH)2. It usually occurs in the form of splotchy, anhedral crystals forming within a group or structure in other minerals or rocks, such as kimberlite. Its composition is as follows: Magnesium 5.82% Mg 9.66% MgO Manganese 6.58% Mn 8.50% MnO Iron 46.84% Fe 60.26% FeO Hydrogen 2.42% H 21.58% H2O Oxygen 38.34% O Amakinite is slightly magnetic and was named for the Amakin Expedition, which prospected the diamond deposits of Yakutia.
Market Value Factors
Pricing varies for every rock and mineral, so use these universal factors to gauge Amakinite before comparing listings or appraisals.
Size & Weight
Larger, intact specimens usually command higher prices.
Rarity & Demand
Scarce material or popular varieties sell at a premium.
Condition & Finish
Chips, repairs, and heavy wear lower value; clean prep helps.
Treatment & Provenance
Untreated specimens with documented locality are prized.
Quick Facts
Physical Properties
- Color
- Pale green to yellow-green; rapidly turns brown when exposed to air, due to formation of Fe(OH)3
- Hardness (Mohs)
- 3.5 - 4
- Rock tumbling
- Not recommended
- Density
- 2.74 g/cm³
Chemical Properties
- Chemical Formula
- Fe2+(OH)2
- Elements
- Fe, H, O
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Amakinite FAQs
How do I identify Amakinite?
Amakinite can be identified by its hardness of 3.5 - 4 on the Mohs scale, Pale green to yellow-green; rapidly turns brown when exposed to air color. Look for these key characteristics when examining specimens.
What color is Amakinite?
Amakinite typically appears in Pale green to yellow-green; rapidly turns brown when exposed to air, due to formation of Fe(OH)3. Color can vary depending on impurities and formation conditions.
How hard is Amakinite?
Amakinite has a hardness of 3.5 - 4 on the Mohs scale. This gives it moderate hardness.
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