Alexandrite buying guide: colour, cost and rings in Australia

Start with the colour change

Alexandrite is a variety of chrysoberyl. It can appear green or bluish green in daylight and red or purplish red under incandescent light. Some stones show a subtler change or more brown. Keep the viewing angle similar when comparing lights: turning the stone can also change the colour you see. GIA explains the distinction.

When comparing stones, look for three things:

1. Two colours you like. Enjoying both appearances matters more than choosing the most dramatic sales photograph.
2. A clear change in suitable lighting. Compare it in daylight and incandescent light, or suitable gem-viewing lights. Then check it under lighting similar to your home or workplace.
3. Brightness across the stone. View it from above, as it will sit in the ring. Check whether large dark areas or a washed-out centre spoil its brightness.

LEDs can show the effect, but different bulbs do not reproduce the same light. Paired photographs and videos are useful starting points; lighting, camera settings and your screen affect what you see. GIA’s research documents how carefully colour-change photographs are made.

Natural, laboratory-grown or imitation?

These terms describe different materials and origins. Ask for the exact identity in writing, especially when an inexpensive stone shows a striking colour change.

Laboratory-grown alexandrite is an option if you want the effect without natural rarity being your priority. It should be priced and described as laboratory-grown. Colour-change sapphire is a separate gemstone, even when advertised as “alexandrite sapphire”. See GIA’s synthetic-gem explanation and alexandrite buying advice.

For the broader terminology, read our guide to natural, treated and lab-created gemstones.

Check the paperwork before paying a natural-stone premium

For a significant natural alexandrite purchase, an independent gemmological report is useful evidence. Check the report number and match its measurements, weight and description to the stone being offered.

GIA evaluates alexandrite but does not give it a diamond-style quality grade. Its reports can identify natural or laboratory-grown material and detectable treatments; a country-of-origin opinion is available when possible and requested. A seller’s “AAA” label is not a GIA grade. GIA explains its report scope.

Although alexandrite is usually untreated, ask about this stone’s treatments and any cracks. A supplier card, independent identification report and insurance valuation serve different purposes.

Country of origin can affect price, but judge the actual gem. Russia has the historical reputation; fine Brazilian and Indian stones can also show exceptional colour change. Colour alone cannot prove origin. GIA’s origin research explains the laboratory evidence involved.

What does alexandrite cost in Australia?

Colour change, the attractiveness of both colours, clarity, cut and size all influence price. Fine larger stones are scarce, so carat weight alone is a poor basis for comparison. GIA’s quality guide explains these factors.

These three cushion-cut listings from Anny’s alexandrite search were checked on 19 September 2026. Their public details do not state natural or lab-grown status, treatment or country of origin. Ask us to confirm those details and any report before comparing value.

Australian dollars, including GST as stated on the product pages. Stone only; setting and manufacture are additional. Prices and availability can change.

These are individual price examples, not a market average or a matched-quality comparison. “Parti” and “Colour Change” are listing labels, not quality grades.

Compare millimetres as well as carat weight: a squarer cushion and a more elongated cushion will look different on the hand. Set a budget for the complete ring, then consider the stone and setting together. Confirm viewing arrangements before travelling for a particular gemstone.

Is alexandrite suitable for an engagement ring?

Yes. Alexandrite resists scratches well and has excellent resistance to chipping and breaking, making it a practical choice for regular ring wear. It rates 8.5 on the Mohs scale, which measures scratch resistance. Hard knocks can still damage it. GIA’s care guide explains its suitability for rings.

The design still matters. Discuss the setting height, protection around the stone’s edge and how the ring will sit beside a wedding band. A lower setting or a bezel, which surrounds the edge with metal, may suit someone who is concerned about catching the ring. Compare that with the look of claws before deciding.

Looking after your ring

Clean with warm water, mild soap and a soft brush, then rinse and dry gently. Remove the ring for heavy manual work, gym weights and activities where it may be knocked; store it separately from other jewellery.

GIA says ultrasonic and steam cleaning are usually safe for alexandrite, but fracture-filled stones should receive only warm, soapy water. Have a jeweller check the stone and setting before machine cleaning. GIA care and treatment advice.

For resizing or repairs, bring the ring for assessment; safe methods depend on the stone’s condition, any treatment and the ring’s construction.

Common questions about alexandrite