Galena: lead sulphide, mineralogy, precautions and care

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Galena is a grey, shiny, very heavy lead sulphide that forms cubes. An ore of lead and silver, it contains lead: safety, historical uses and care.

Key points

Colour	lead grey, metallic lustre on fresh fractures; tarnishes
Mineral family	lead sulphide, PbS
Crystal system	cubic (cubes, sometimes octahedra)
Hardness (Mohs)	2.5 to 2.75
Density	about 7.2 to 7.6 (very heavy)
Cleavage	perfect in three directions, giving cubic fragments
Streak	lead grey
Known deposits	Freiberg (Saxony), Cornwall, Broken Hill and Mount Isa (Australia), Missouri (United States)
Precautions	contains lead: see the safety box below

What is galena?

Galena is a lead sulphide (PbS) and the main lead ore. It forms silvery grey cubic crystals, shiny on fresh fractures, which split into small perfect cubes (cleavage in three directions). It is soft (2.5 to 2.75 on the Mohs scale) and above all very heavy: its density is 7.2 to 7.6, nearly three times that of quartz. Its weight comes as a surprise when you pick it up.

Its name comes from a Latin word for lead ore. It sometimes contains a little silver (up to about 0.5% according to some sources), to the point that the silver can be worth more than the lead extracted. See also our page on the density of a stone.

Where is it found, and what has it been used for?

Galena forms mainly in hydrothermal veins, together with sphalerite, calcite and fluorite. Famous deposits are those of Freiberg in Saxony, Cornwall, Broken Hill and Mount Isa in Australia, and the Missouri “lead belt”, considered the largest known deposit.

Its history of use is rich: once powdered, it went into eye cosmetics in antiquity (Egyptian kohl) and into paints. In the early 20th century, galena crystals served as detectors in the first “galena” radio sets. Today it is mined for the lead in batteries and for its silver. Over time and exposure to air, it alters into anglesite and cerussite, two lead minerals.

Safety: a mineral that contains lead

Never in the mouth, nor within reach of children and animals: lead is toxic, and children and pregnant women are particularly sensitive to it.
No elixirs: do not let it soak in water you drink, nor use it in any drink.
Hands: galena blackens the fingers and leaves dust. Wash your hands with soap and water after handling, especially before eating.
Dust: do not sand, file, saw or crush it without protection (filter mask, gloves, ventilation). Do not heat or burn it: lead fumes are dangerous.
Environment: do not pour wash water into a pond or stream; take waste to a recycling centre.

A solid, intact piece, held briefly with clean hands, carries little risk: it is swallowing or inhaling dust that causes problems. See our page on toxic stones. If in doubt after accidental contact with a child, call a poison control centre, 15 (the emergency medical number in France) or 112 (the emergency number throughout the European Union).

Traditional symbolism

Lead is the metal of Saturn in alchemical tradition; galena inherits its associations with gravity, patience, structure and time. In books on “energetic” minerals it is sometimes cited for its weight and solidity.

These associations come mainly from the mineral’s colour and weight. They are symbolic, with no scientific evidence. Because of the lead it contains, galena is mainly a collector’s and mineralogy piece rather than a pocket stone.

Traditional correspondences

Domain	Correspondence cited
Planet	Saturn (lead, in alchemy)
Chakra	root
Element	earth
Signs	Capricorn (the sign of Saturn), Aquarius
Keywords	patience, structure, time

See the root chakra; these correspondences are traditions (origin of the chakras).

How to use it and care for it

As a collector’s piece: a cluster of cubes or a single cube, in a display case or closed box.
As a study object: to understand density, cubic cleavage and streak.
Cleaning: a dry brush or cloth. No stiff brush, no acid product.
Shine: it tarnishes in air and humidity; do not polish it, as that would produce dust.
Storage: alone, away from children and from softer stones.
Not as jewellery: too heavy, too soft and it contains lead.

For symbolic cleansing, prefer sound or smoke (guide); avoid water and salt.

Recognising galena

Sign	Galena	Easily confused with
Weight	very heavy for its size	hematite (also heavy, but red streak), molybdenite (flaky, lighter), graphite (light)
Shape	perfect cubes and flat faces	pyrite (striated cubes, brassy yellow)
Fracture	cubic fragments	stibnite (elongated needles)
Streak	lead grey	hematite: reddish brown

See also molybdenite, pyrite and hematite. Imitations are rare; raw galena is sold on its host rock. For general guidance: real or fake stone? and Our commitments.

How to choose

Choose a clean and stable piece, with well-formed cubes firmly attached to their matrix. Glossy clusters from classic deposits (Freiberg, Missouri, Cornwall) are more sought after; common pieces are affordable. Always ask for the provenance, and handle the stone with clean hands, then wash them.

Pairings for a collection: with sphalerite, cerussite or fluorite, which occur in the same veins. This stone is a mineral to observe, with no proven effect on health.