Crystal Care Checker

Generally durable in water, but dyed material may bleed and some geodes contain more delicate minerals.

Some dyed colours can fade in strong light.

Brief water contact is generally fine, but avoid prolonged soaking and hard knocks.

Long, intense sunlight may alter colour in some feldspars.

Brief contact with water is generally tolerated by intact quartz, but avoid soaking pieces with fragile matrix, coatings or repairs.

Long, intense sunlight can fade some amethyst over time.

Generally tolerant of brief water contact.

Avoid prolonged intense sunlight.

Keep dry. Anhydrite can alter toward gypsum with prolonged moisture exposure.

Avoid humidity and harsh direct sun.

Avoid soaking fractured pieces and protect from scratches.

Some colours may fade under prolonged intense light; display conservatively.

Avoid soaking and sudden temperature changes; crystals have good cleavage.

Keep away from strong heat and prolonged harsh sun.

Generally tolerant of brief water contact, but protect included crystals from thermal shock.

Normally light-stable indoors.

Avoid acids, soaking and rough handling.

Keep out of prolonged intense sunlight if colour is important.

Keep dry and avoid acids. Handle delicate crystals minimally.

Prolonged exposure to strong light and poor conditions may affect colour and surface quality.

Avoid prolonged soaking and rough handling; many crystals have delicate edges.

Generally stable indoors.

Brief water contact is generally fine for intact crystals; avoid soaking fragile matrix pieces.

Stable in normal indoor light.

Generally tolerant of brief water contact.

Stable in indoor light.

Generally tolerant of brief water contact.

Dyed colour can fade; protect from harsh sunlight.

Keep dry and avoid acids.

Surface tarnish naturally evolves over time.

Avoid acids and long soaking. Dry cleaning or a barely damp cloth is safer.

Some coloured specimens can fade; avoid prolonged direct sun.

Generally tolerant of brief water contact.

Usually reasonably light-stable indoors.

Avoid soaking and rough cleaning; it is relatively soft and can be fragile.

Pale colour may fade with prolonged strong sunlight.

Keep dry and avoid acids.

Tarnish can change with air and humidity; store dry.

Avoid soaking unless composition and treatment are known; gentle dry cleaning is safest.

Avoid prolonged harsh sunlight.

Generally tolerant of brief water contact.

Prolonged strong sunlight or heat may affect colour; store conservatively.

Generally tolerant of brief water contact.

Avoid prolonged intense sunlight if preserving colour is important.

Generally safe for brief water contact unless coatings, matrix or repairs are present.

Stable in ordinary indoor light; coated varieties may be more sensitive.

Generally tolerant of brief water contact.

Stable in normal indoor light.

Generally tolerant of brief water contact.

Dyed material may fade in strong light.

Avoid ultrasonic cleaning and harsh chemicals on treated gem material.

Stable in ordinary indoor light.

Avoid soaking; fluorite is softer and can have cleavage fractures. Wipe gently instead.

Some fluorite can fade with prolonged strong sunlight.

Generally durable for brief water contact.

Usually stable in normal indoor light.

Generally tolerant of brief water contact.

Usually stable indoors; avoid extreme prolonged sunlight as a precaution.

Generally tolerant of brief water contact.

Stable under normal indoor display.

Brief wiping is fine, but keeping specimens dry is sensible, especially with mixed matrix.

Stable in indoor light.

Avoid long soaking because porous material can absorb water or release dye.

Dyed pieces can fade in strong light.

Generally fine with brief water contact; protect included gems from sudden temperature change.

Stable indoors.

Generally durable for brief water contact.

Most varieties are stable in normal indoor light.

Avoid soaking fragile bladed specimens and handle gently.

Generally stable indoors.

Brief contact with water is usually fine, but avoid soaking fractured pieces.

Ordinary indoor light is fine; protect polished surfaces from abrasion.

Avoid soaking, acids and harsh chemicals; gentle wiping is best.

Strong sunlight may affect dyed or treated material.

Avoid soaking, acids and abrasive cleaners.

Colour can fade with prolonged strong sunlight and heat.

Avoid soaking and abrasive cleaning; it can flake and scratch easily.

Display away from prolonged strong sunlight and humidity.

Keep dry when possible, especially if the specimen contains other iron minerals.

Stable in indoor light.

Avoid acids, soaking and abrasive cleaners. Wash hands after handling dusty rough material and do not ingest.

Keep away from harsh prolonged sun and heat.

Brief water contact is usually fine; avoid knocks because feldspar has cleavage.

Normal indoor display is suitable.

Generally durable in brief water contact; avoid thermal shock in included stones.

Stable indoors.

Generally tolerant of brief water contact.

Most natural material is stable indoors; dyed pieces may fade.

Keep dry and avoid bending or scrubbing thin crystals.

Stable indoors.

Water itself is generally not a problem, but sharp raw edges can cut skin.

Stable in ordinary indoor light.

Generally tolerant of brief water contact.

Most material is stable indoors.

Quartz onyx generally tolerates water; calcite sold as onyx is acid-sensitive and softer.

Most material is stable indoors; dyed material may vary.

Avoid prolonged soaking unless you know the opal type; avoid sudden drying/heat changes.

Avoid heat and prolonged harsh sunlight; some opals can craze if dehydrated.

Brief water contact is generally fine; avoid acids and thermal shock.

Stable in ordinary indoor light.

Generally tolerant of brief water contact.

Stable indoors; avoid prolonged intense sun for colour-sensitive included materials.

Generally tolerant of brief water contact.

Stable indoors.

Brief water contact is usually fine for solid material; avoid soaking matrix specimens.

Prolonged strong sunlight may affect some colour.

Keep dry; prolonged moisture can encourage oxidation and deterioration in susceptible specimens.

Stable in ordinary indoor light; humidity control matters more than sunlight.

Generally tolerant of brief water contact.

Stable indoors.

Avoid acids, soaking and abrasive cleaning.

Some pink colour can fade with prolonged strong light; display conservatively.

Brief water contact is usually fine for solid polished pieces; avoid acids and long soaking.

Generally stable indoors.

Generally tolerant of brief water contact when untreated and intact.

Prolonged strong sunlight may fade some specimens.

Generally tolerant of brief water contact.

Stable indoors; avoid intense prolonged sunlight as a general precaution for treated material.

Keep dry. Gypsum is water-sensitive and very soft.

Avoid prolonged humidity and harsh sunlight; protect from scratching.

Avoid acids and long soaking because carbonate-filled sections can react.

Stable indoors.

Avoid acids and long soaking; some varieties are soft.

Generally stable indoors.

Wipe rather than soak, particularly for porous material.

Stable indoors; avoid creating or inhaling dust.

Generally tolerant of brief water contact.

Avoid prolonged intense sunlight.

Generally tolerant of brief water contact.

Prolonged strong sunlight may lighten some smoky quartz.

Generally fine with brief water contact; avoid sharp raw edges.

Stable indoors.

Avoid long soaking, particularly in fractured or mixed material.

Some sodalite may fade under intense UV exposure; display away from harsh direct sun.

Brief water contact is usually acceptable for intact material.

Generally stable indoors.

Generally tolerant of brief water contact.

Normally stable in indoor display.

Generally tolerant of brief water contact.

Stable indoors.

Avoid soaking, cosmetics, oils, acids and ultrasonic cleaning.

Prolonged sunlight, heat and chemicals can alter colour.

Generally tolerant of brief water contact.

Stable in ordinary indoor light.