Ruby and sapphire are the same mineral — corundum — in different colours. Red corundum is called ruby. Every other colour, from blue to pink, yellow and green, is called sapphire.
So when you compare ruby vs sapphire, the big differences are colour, rarity, price and meaning. Both score 9 on the Mohs scale, just below diamond, and both are superb for everyday jewellery. Here is how they compare, side by side.
Ruby vs sapphire at a glance
| Feature | Ruby | Sapphire |
|---|---|---|
| Mineral | Corundum | Corundum |
| Colour | Always red | Every colour except red; blue is the most famous |
| What gives the colour | Chromium | Iron and titanium (blue) |
| Hardness (Mohs) | 9 | 9 |
| Most prized colour | Pigeon blood red | Rich, velvety royal blue |
| Famous sources | Myanmar, Thailand, Vietnam, Mozambique | Sri Lanka, Kashmir, Madagascar |
| Birthstone | July | September |
| Symbolises | Love, passion, energy | Wisdom, truth, loyalty |
| Value | Usually higher for the same size and quality | Wide range; some rare types match ruby |
Are sapphires and rubies the same stone?
Yes — mineral-wise, they are. Both are corundum, a hard mineral made of aluminium oxide. Tiny amounts of other elements inside the crystal decide the colour.
- Ruby is red corundum. Its colour comes from chromium.
- Sapphire is corundum in any other colour. Blue sapphire gets its colour from iron and titanium.
So why are they sold as two gems? There are three reasons:
- Colour: the deep red of ruby is special and rare.
- Culture: the two stones carry very different meanings around the world.
- Value: fine rubies are rarer, so they are usually priced higher.
People did not always know. In ancient times nobody knew rubies and sapphires were the same mineral. They were loved for centuries as completely separate stones.
How rubies and sapphires form
Both form deep inside the earth. Over millions of years, heat and pressure grow corundum crystals. As they form, they take in traces of chromium (for ruby) or iron and titanium (for blue sapphire).
Colour: the biggest difference
Ruby is always red. The shade can run from light red to dark red, but it must be red to be called ruby. The most prized rubies are a deep red with a slight blue hint, known as "pigeon blood". Shop our natural ruby collection.
Sapphire is best known in blue. The finest blue sapphires have a rich, velvety colour. See our blue sapphire (Neelam) stones.
What are fancy sapphires?
Sapphires in colours other than blue are called fancy sapphires. They include:
- Pink sapphire
- Yellow sapphire
- Green sapphire
- Purple sapphire
- Orange, white and even black sapphire
The rule is simple: only red corundum is ruby. Any other colour is sapphire. Browse the full range in our sapphire collection.
Hardness and durability
Both score 9 out of 10. Only diamond, at 10, is harder. That means both resist scratches and knocks very well.
Made for daily wear. This toughness makes both gems great for rings, earrings and necklaces you wear every day — and for engagement rings and heirlooms passed down through generations.
Value and rarity: which is more expensive?
Ruby usually costs more. A fine red ruby, especially a pigeon blood stone from Burma (Myanmar), is very rare. A high-quality ruby can be worth more than a sapphire of the same size and quality.
Big rubies are rarer still. Sapphires, especially blue ones, are found in larger sizes more often than rubies.
Some sapphires match ruby. Fine sapphires from Kashmir or Sri Lanka can be just as valuable. The pink-orange Padparadscha sapphire is extremely rare and can rival top rubies.
The Four Cs decide the price. For both gems, value comes down to colour, clarity, cut and carat weight.
Where do rubies and sapphires come from?
- Rubies: Myanmar (Burma) produces some of the best rubies in the world. Thailand, Vietnam and Mozambique are also known for them.
- Sapphires: Sri Lanka, Kashmir and Madagascar. Kashmir sapphires are among the finest for their blue. Sri Lanka gives sapphires in many colours, from blue to pink to yellow.
Cut and shape
Rubies are cut to save weight. Both gems can be cut round, oval, pear and more. Because good rubies are rarer, cutters try not to waste any of the rough, so they choose shapes that keep as much size as possible.
Sapphires allow more variety. As sapphires come in bigger sizes, you will see them in more shapes, such as a neat heart or a brilliant square.
Meaning and symbolism
These meanings come from history and tradition, not proven fact.
Ruby: the stone of love. In ancient India, ruby was called the "king of gemstones". It stands for passion, energy and love. Many cultures believed it brought good fortune and protection, and warriors wore it for strength and courage in battle.
Sapphire: the stone of wisdom. Blue sapphire stands for truth, loyalty and honesty. Kings and queens wore it as a symbol of purity and virtue, believing it guarded them from evil and brought divine blessings. Many people wear it today as a reminder to stay calm and clear-headed.
Birthstones and anniversary stones
- Sapphire is the birthstone for September and a classic gift for loyalty and wisdom.
- Ruby is the birthstone for July and the traditional gift for a 40th wedding anniversary. Read more about ruby as the July birthstone.
Famous rubies and sapphires
Princess Diana's sapphire. Her engagement ring, a 12-carat blue sapphire surrounded by diamonds, is one of the most famous rings in the world. It is now worn by Kate Middleton. Sapphires also appear in the British Crown Jewels and other royal collections.
The Sunrise Ruby. This 25.59-carat Burmese ruby sold for over $30 million, one of the highest prices ever paid for a ruby. In history, rubies were also prized by the Roman emperor Nero and by the Mughal emperors of India.
A giant ruby. The largest ruby ever found weighed over 8,000 carats.
Ruby or sapphire: which should you choose?
- Colour: if you love red, choose ruby. If you prefer calm blue, or another colour, choose sapphire.
- Meaning: ruby stands for love and energy; sapphire for loyalty, wisdom and calm.
- Occasion: rubies suit romantic gifts, anniversaries and bold pieces like cocktail rings. Sapphires are a favourite for engagement rings because of their link with faithfulness, and they look elegant every day.
- Metal: blue sapphire pairs well with platinum, white gold or yellow gold.
- Budget: rubies can cost more, so a sapphire may stretch your budget further.
Or wear both. A ring with a ruby in the centre and sapphires on the sides brings the two together.
How to care for ruby and sapphire
- Clean simply: warm, soapy water and a soft brush are all you need.
- Skip harsh cleaners: avoid strong chemicals and ultrasonic cleaners, which can damage the stones over time.
- Store separately: keep them apart from other jewellery to prevent scratches.
FAQs
Are rubies and sapphires the same stone?
Yes. Both are corundum. Red corundum is ruby, and all other colours are sapphire. Their colour, meaning and value are what set them apart.
Is ruby more expensive than sapphire?
Usually, yes. Fine rubies are rarer, so they often cost more than sapphires of the same size and quality. Rare sapphires such as Kashmir or Padparadscha can be just as valuable.
Is a pink sapphire a ruby?
No. Only red corundum is called ruby. Pink corundum is sold as pink sapphire, one of the fancy sapphire colours.
Which is harder, ruby or sapphire?
Neither. Both score 9 on the Mohs scale, so they are equally tough and good for everyday wear.
Which is better for an engagement ring?
Both work well because they are so hard. Sapphire is the classic choice for loyalty, while ruby suits couples who want a symbol of passion and love.
Gemstone traditions are cultural beliefs, not medical advice. See our gemstone and healing disclaimer.