Round Brilliant Cut Ruby
Specifications
| Mineral | Corundum (Ruby) |
| Cut Style | Round Brilliant Cut |
| Measurements | 4.7 mm diameter x 3.1 mm depth |
| Total Weight | 0.55 carats |
| Hardness | 9 on the Mohs scale |
| Birthstone | July |
| SKU | RUBY001 |
About Ruby as a Gemstone
Ruby is the red gem variety of corundum, coloured by chromium replacing a small fraction of the aluminium in its structure. The same chromium that produces the red also causes fluorescence, which can make fine ruby appear to glow in sunlight. Stones too light in tone are classed as pink sapphire. You can read more via gemmological reference, mineral data.
Ruby forms in marbles produced where limestone is metamorphosed, and in basalt-hosted deposits. The chromium needed for red is rarely found alongside aluminium in nature, which is a large part of why fine ruby is scarcer than most other coloured gems.
Why You Will Love This Gemstone
💎 Setting Suitability
The high hardness rating makes this ruby robust enough for daily ring wear without showing rapid surface abrasion.
✨ Cut Precision
Facets are arranged to return light efficiently from the center of the stone outward toward the girdle.
🔷 Design Potential
Your jeweller can mount this round brilliant easily in prong, bezel, or flush settings for modern or antique styles.
📦 Exactly What Is Pictured
The photographs and video show this gemstone. You receive the gemstone pictured, not a lookalike.
Popular Uses
Ruby has been prized for millennia and remains among the most sought-after coloured stones. Its hardness of 9 makes it practical for rings worn daily, and it is the traditional July birthstone and a classic anniversary gift. A Ruby of this size works particularly well as the centre stone in a bespoke piece.
Ideal For
- Custom ring, pendant and earring projects
- Collectors building a set of single natural stones
- Jewellers who need exact measurements before designing a setting
- Everyday jewellery that will see regular wear
- Gifts where a specific colour and weight matter
More From Gemystic
Browse the rest of our loose gemstones, see more ruby, or view the full catalogue. Everything we list is weighed, measured and photographed individually before it goes online.
Care Instructions
- Clean the stone using warm soapy water and a soft-bristled brush to remove everyday skin oils.
- Store the gem separately in a lined box to prevent it from scratching your other specimens.
- Check the setting periodically with your jeweller to ensure the metal claws remain tight and secure.
- Avoid ultrasonic cleaners unless a gemmologist has checked the stone first.
Frequently Asked Questions
What are the exact measurements of this Ruby?
This stone measures 4.7 mm diameter x 3.1 mm depth and weighs 0.55 carats. Those figures are taken from the stone itself, not estimated from a category average.
Can I set this stone in a daily wear ring?
Yes, corundum ranks just below diamond on the Mohs scale, which means it stands up very well to regular daily wear. Your jeweller can secure it safely in a ring mounting without undue worry about scratching during normal activities.
What metal colour suits this red hue best?
Traditional yellow gold warms up the red body colour, while platinum or white gold creates a sharp, high-contrast look. Many designers also use rose gold to echo the warm undertones found within the ruby itself.
How does corundum compare to softer red gems?
Unlike softer red materials such as garnet or spinel alternatives, ruby resists chipping and facet edge wear much better over decades of use. This durability makes it a practical choice for heirloom pieces passed down through generations.
How should I store this loose stone?
Keep the gem in a dedicated paper parcel or a fabric-lined box away from other harder minerals. Because corundum can scratch softer stones easily, it should not rattle freely against other specimens in your collection.
Will I receive the exact stone shown in the photos and video?
Yes. Each listing covers one individual stone, and the media on this page was shot from that stone. Once it sells, the listing comes down.
Own This Ruby Today
This Ruby is a one-off stone at 0.55 carats. Once it is gone the listing closes for good. See the full collection.
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