Prasiolite: Meaning, Symbolic Properties and Care

← Back to Guide to stones

Prasiolite is a pale green quartz, almost always obtained by heating amethyst. Hard and luminous, it is sometimes wrongly called “green amethyst”.

Key points

Colour	pale green, mint green, yellow-green
Mineral family	quartz (SiO2), green variety
Mohs hardness	7
Origin of the colour	iron, and heating of amethyst or grey-violet quartz to about 650 °C
Origin of the name	Greek prason (leek) and lithos (stone)
Natural deposits	rare: Lower Silesia (Poland), California, Thunder Bay (Canada)
Traditional chakra	heart

What is prasiolite?

Prasiolite is a transparent green quartz with a hardness of 7. Its name comes from the Greek prason, leek, and lithos, stone: a “leek-coloured stone”. In nature it is extremely rare; deposits are reported in Lower Silesia (Poland), in California and at Thunder Bay (Canada). The vast majority of prasiolite sold is obtained by heating amethyst (or grey-violet quartz) to about 650 °C: the violet tint disappears and gives way to a clear, pale green.

This heat treatment is common and very stable, and it simply needs to be disclosed. Synthetic green quartz also exists: only an analysis of impurities can truly distinguish synthetic crystals from heated prasiolite.

Prasiolite, prase, chrysoprase: three related names

Prasiolite is a transparent green quartz, obtained mainly by heating.
Prase quartz is a macrocrystalline green quartz coloured by amphibole needles (for example hedenbergite from the island of Elba). It is a different stone, natural, darker and less clear.
Chrysoprase is an apple-green, microcrystalline chalcedony with an opaque appearance, coloured by nickel.

The names “green amethyst” or “vermarine” should be avoided: they are misleading, since amethyst is by definition violet. Gemmology practice recommends sticking to “prasiolite”.

Traditional symbolism

In modern writings on stones, prasiolite is linked to the green of nature, renewal and calm: a soft green, without the gravity of emerald. It is described as a stone of gentleness and openness. No ancient tradition is attached to it: it is a modern stone of the trade.

These are recent symbolic associations, with no proven effect.

Traditional correspondences

Element	Association cited
Chakra	heart (heart chakra)
Element	earth or air
Signs	Taurus, Virgo or Libra depending on the author, with no consensus

How to use it

As jewellery: ring, pendant, earrings in faceted stone. Its hardness of 7 makes it comfortable for everyday wear.
As beads for a necklace or a light bracelet.
As a point or cluster for decoration, in pale green, often from heated lots.
As a gift: for a spring birthday, or to accompany a move into a room with plants.

Care

Prasiolite is hard and cleans easily with lukewarm water and a mild soap. In most cases it tolerates ultrasonic cleaning. However, avoid prolonged exposure to strong light or intense heat, as some coloured quartz can fade over time: keep it in the shade when you are not wearing it. Avoid hard knocks, which can chip it. For symbolic purification, gentle smoke or moonlight are suitable; see cleansing and recharging your stones.

Recognising a genuine piece and avoiding surprises

Prasiolite is pale green and clear; a very dark, saturated green suggests glass, synthetic quartz, or another stone.
A perfectly even colour with not the slightest inclusion may be glass or laboratory-grown quartz.
“Green” quartz that is dyed or irradiated does exist, as do smoky quartz; ask whether the colour is stable.
It can be confused with peridot, which is more yellow-green and softer, or with green fluorite, which is much softer.
Always ask about heating: an honest seller will say “prasiolite (heated amethyst)”.

From violet to green: understanding heating

Heating amethyst to about 650 °C alters the state of the iron within the crystal, which makes the violet disappear. Depending on the temperature and the type of crystal, the result may be yellow-orange (citrine), pale green (prasiolite) or, more rarely, a mixture. This process is industrial, long established and very widespread, and it explains why prasiolite is far more affordable than one would expect for a stone so rare in its natural state. It is not a flaw, provided the seller discloses it: the stone remains genuine quartz.

To verify a claim of natural origin, only a laboratory analysis provides reliable proof.

How to choose

Choose a soft, clear green, well cut, without chips. Heated prasiolite is more affordable than many green gems; natural prasiolite is exceptional and expensive. Pair it with amethyst, citrine or ametrine. See also choosing and caring for your stones.