Kernite
A variety of Minerals
What is Kernite?
Kernite, also known as rasorite, is a hydrated sodium borate hydroxide mineral with formula Na2B4O6(OH)2·3H2O. It is a colorless to white mineral crystallizing in the monoclinic crystal system typically occurring as prismatic to acicular crystals or granular masses. It is relatively soft with Mohs hardness of 2.5 to 3 and light with a specific gravity of 1.91. It exhibits perfect cleavage and a brittle fracture. Kernite is soluble in cold water and alters to tincalconite when it dehydrates. It undergoes a non-reversible alteration to metakernite (Na2B4O7·5H2O) when heated to above 100 °C.
Uses & Applications
Kernite is used to produce borax which can be used in a variety of soaps.
Market Value Factors
Pricing varies for every rock and mineral, so use these universal factors to gauge Kernite 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.
Kernite Localities Map
See where Kernite is found with a localities map, collecting zones, and geology context. Generate a sample map preview below.
Quick Facts
Physical Properties
- Color
- Colourless to white.
- Hardness (Mohs)
- 2.5
- Density
- 1.905 g/cm³
- Streak
- White
Chemical Properties
- Chemical Formula
- Na2[B4O6(OH)2] · 3H2O
- Elements
- B, H, Na, O
Identify Kernite Instantly
- Snap a photo, get instant results
- 6,700+ rocks, minerals & crystals
- Discover collecting spots near you
Kernite FAQs
How do I identify Kernite?
Kernite can be identified by its hardness of 2.5 on the Mohs scale, Colourless to white. color. Look for these key characteristics when examining specimens.
What color is Kernite?
Kernite typically appears in Colourless to white.. Color can vary depending on impurities and formation conditions.
How hard is Kernite?
Kernite has a hardness of 2.5 on the Mohs scale. This makes it a soft mineral that can be scratched easily.
%252FAbenakiite-(ce)-01.jpg&size=small)
