Ruby is the red variety of corundum, colored by chromium and treasured as one of the classic precious gems — historically called the “king of gems.” Only red corundum is ruby; every other color is sapphire. It is the traditional birthstone for July.
Last updated: August 2026
Ruby meaning and properties
In crystal tradition, ruby is associated with passion, vitality, courage, and love — a bold stone of life force and devotion that many people keep close for energy, confidence, and heartfelt warmth. It is most often linked to the Root Chakra for vitality and drive and the Heart Chakra for love, and is commonly associated with the zodiac signs Leo, Cancer, and Scorpio. As with all crystals, these associations are part of a personal wellness practice rather than medical fact.
An important honesty point: nearly all rubies on the market are heat-treated to improve color and clarity — a stable, accepted practice. Beyond that, be aware of two things: inexpensive “ruby” is often synthetic (lab-grown corundum, chemically real but abundant and low-cost), and glass-filled or composite rubies use lead glass to fill fractures and are far less durable. A reputable seller will disclose treatment and origin.
The facts: ruby at a glance
- Composition: corundum — aluminum oxide (Al₂O₃); the red color comes from trace chromium
- Hardness: Mohs 9 — second only to diamond, exceptionally hard and durable
- Main sources: Myanmar (Mogok, source of the famed “pigeon’s blood” red), Mozambique, Thailand, Sri Lanka, Madagascar, Tanzania, and Afghanistan
- Water safety: untreated and heat-treated ruby is very durable and water-safe for a quick rinse; glass-filled composite ruby should be kept away from water, heat, and chemicals, which attack the glass
- Sun/light sensitivity: color is stable — no special sun precautions needed
- Look-alikes: garnet, red spinel, red tourmaline (rubellite), red glass, synthetic ruby, and glass-filled composite stones
How to use ruby
- Wear or carry it as a stone of passion, courage, and vitality — see crystals for love and relationships
- Hold it when you want a boost of energy, drive, or confidence
- Keep a piece close to reconnect with warmth and life force
- Pair with garnet for a doubled root-chakra passion-and-vitality combination
- Pair with rose quartz for a warm heart-centered pairing, or give ruby as a meaningful July birthday gift
Caring for your ruby
Natural and heat-treated ruby is one of the toughest gems and needs little fuss — clean it with warm water and a soft cloth and dry it afterward. The exception is glass-filled composite ruby, which should never see ultrasonic cleaners, steam, heat, or acids, as these dissolve the lead glass. When in doubt, treat a piece as delicate. Cleanse it energetically with selenite, sound, moonlight, or smudging. See our cleansing and charging guide.
Frequently asked questions
What is the difference between ruby and sapphire?
They are the same mineral, corundum. Red corundum is called ruby; every other color — blue, yellow, pink, and so on — is sapphire. The chromium that turns corundum red is what makes a ruby a ruby.
Are most rubies treated?
Yes. Nearly all rubies are heat-treated to improve color and clarity, which is stable and accepted. Watch instead for glass-filled composite rubies and lab-grown synthetics, which a good seller will disclose.
Can ruby get wet?
Natural and heat-treated ruby is very hard (Mohs 9) and safe for a quick rinse. Glass-filled composite ruby, however, should be kept away from water, heat, and chemicals.
Is ruby safe to wear every day?
Yes. At Mohs 9, ruby is one of the most durable gems there is, excellent for everyday rings and jewelry — the main caution is for treated composite stones.
What does ruby pair well with?
Ruby pairs beautifully with other passion and root-chakra stones such as garnet and rose quartz for a warm, energizing combination.
Shop ruby at The Harmony Store
Browse our ruby collection — tumbled stones and jewelry. Continue exploring: Sapphire: Meaning, Properties & Uses (ruby’s corundum sibling), Garnet: Meaning, Properties & Uses, and Red Spinel: Meaning, Properties & Uses.
Crystals are part of a personal wellness and spiritual practice — they are not a substitute for professional medical or mental-health care.
The Largest Crystal Shop in Miami
Visit The Harmony Store in Miami — in the Kendall neighborhood at 7572 SW 117th Ave, Miami, FL 33183 — to see our ruby in person. Call us at (786) 483-9172.
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