There is a whole world beyond white.

Notice hue (the colour family), tone (how light or dark it is) and saturation (its intensity). The most prized combination varies by gemstone. A richer colour is not automatically better if the stone becomes so dark that it loses life.

Move the stone. Look for areas that stay dark, uneven colour and a pale, see-through area in the centre, often called a window. Compare it in more than one light source: the colour you love in a display case needs to suit the way you will wear it.

Market preferences affect price, but your taste is a useful guide. A softer shade can be exactly right for your piece. Ask to compare it with the colour commanding the premium, then decide which you prefer.

Ruby is the red variety of corundum, the same mineral family as sapphire. Its historical status reaches back to Sanskrit writings, where its name expressed its standing as a king among gems. That long association with power and passion helps explain its enduring appeal. Explore ruby’s history with GIA.

What earns a premium: vivid red colour, good transparency and rarity in larger sizes. Fine stones with an independent report finding no evidence of heat can command an additional premium. A famous origin alone does not establish quality.

Where to be flexible: compare a smaller vivid stone or a disclosed heat-treated ruby. Ask exactly which treatment was used: heating, diffusion and lead-glass filling are different propositions with different values and care needs.

Living with it: corundum is a strong candidate for regular wear, but treatments and fractures matter. Have care instructions confirmed for the specific ruby.

Sapphire’s royal associations span centuries. The blue sapphire engagement ring given to Lady Diana Spencer in 1981 brought that history into a modern love story. Pink, yellow and other colours open up a much broader palette than the familiar blue. Read GIA’s sapphire history.

What earns a premium: fine blue sapphires combine strong colour with brightness, rather than looking inky. Exceptional quality, a sought-after documented origin and a finding of no evidence of heat can add rarity.

Where to be flexible: a softer, greyer or less saturated shade may cost less and suit your design beautifully. Disclosed conventional heat treatment is another comparison to explore. Lattice diffusion is a different treatment and should be identified clearly.

Living with it: like ruby, sapphire is corundum and generally suits regular wear. Check the individual stone’s condition and treatment before choosing the setting.

Emerald is green beryl, a relative of aquamarine. Its history includes ancient Egyptian mines and Cleopatra’s enthusiasm for emerald adornments. Centuries later, Colombian emeralds reached wider markets through trade and Spanish colonial plunder. Read GIA’s emerald history.

What earns a premium: vivid green to bluish green, good transparency and even colour. Visible inclusions are common, making unusually clean, fine-colour stones especially rare. Origin is part of the story, rather than a substitute for judging the gem.

Where to be flexible: accept some visible inclusions if the overall colour and life remain appealing. Ask how much clarity enhancement is present and how it affects value. A pretty stone and a heavily filled stone deserve different conversations.

Living with it: fractures and fillers call for care. Discuss a protective setting; avoid steam and ultrasonic cleaning. GIA explains emerald care.

For centuries, red spinels passed through royal collections under the name ruby. The famous Black Prince’s Ruby is one example. Modern gemology gives spinel its own identity, with reds, pinks, blues and delicate lilacs to discover. Explore GIA’s history of spinel.

What earns a premium: vivid reds and fine blues, good light return and rarity in larger sizes. The colour itself deserves attention; a fashionable descriptive name is not enough.

Where to be flexible: compare pastel pink or lilac with a more saturated colour. Lighter shades can be more affordable, although they also make inclusions easier to notice. A well-proportioned cut matters across the range.

Living with it: spinel is durable enough for many everyday settings. It is rarely treated, but ask rather than assume, and confirm that the stone is natural.

Aquamarine’s name comes from Latin words for water and the sea. This blue to greenish-blue beryl offers a lighter mood than many sapphires, often with a particularly open, clear appearance. Explore the name and history with GIA.

What earns a premium: stronger blue colour, even distribution and good transparency. Fine faceted aquamarine is generally expected to be free of inclusions visible to the unaided eye. Larger stones can show colour more strongly than small ones.

Where to be flexible: if you enjoy a greener blue, it may cost less than a comparable purer blue. A pale shade can be a deliberate aesthetic choice, rather than something to apologise for.

Living with it: ask about heating and any fracture filling. Confirm care for the particular stone; gentle cleaning with warm soapy water is a usual starting point.

Tourmaline spans an extraordinary range, sometimes with more than one colour in a crystal. Copper-bearing Paraíba tourmaline, discovered in Brazil in the late 1980s, drew attention for electric blues and greens. Related copper-bearing material has since been found in Africa; a Paraíba description alone does not establish Brazilian origin. Explore GIA’s tourmaline quality guide.

What earns a premium: vivid attractive colour, a lively cut and rarity. Exceptional copper-bearing colours occupy a different price conversation from many everyday tourmalines.

Where to be flexible: muted greens, soft pinks and earthy shades offer plenty to explore. A bicolour stone can make an individual design. Inspect it while moving it so you can judge any persistent dark areas.

Living with it: heat can damage tourmaline. Ask about treatment and use the cleaning method recommended for your stone; warm soapy water is generally preferred.