Sapphire, emerald or ruby: colored gemstones for engagement
More and more couples choose a colored gemstone for engagement instead of a classic diamond. The reasons vary: a desire for something personal, a connection to a particular color, the symbolism of a stone, or simply that a colored stone makes a bigger visual impact for the same budget.
In this guide we present the three most popular colored gemstones for engagement — sapphire, emerald and ruby — and what to watch for.
First: hardness and everyday wear
An engagement ring is worn every day, so hardness matters. We measure it on the Mohs scale (1–10):
| Stone | Hardness (Mohs) | Suitability for daily wear |
|---|---|---|
| Diamond | 10 | Exceptional |
| Sapphire | 9 | Excellent |
| Ruby | 9 | Excellent |
| Emerald | 7.5–8 | Good, but careful |
Sapphire and ruby are right behind diamond in hardness — an excellent choice for a ring you won't take off. Emerald is somewhat more delicate and often contains natural inclusions, so it needs a little more care.
Sapphire — classic elegance
Sapphire is best known in royal blue, but it exists in almost every shade (pink, yellow, green, even colorless). Blue sapphire symbolizes loyalty and wisdom.
- Advantage: extremely hard, huge range of shades, good price accessibility
- Watch for: color intensity strongly affects price — overly dark or too pale stones are worth less
- Finest tone: vivid, medium-saturated blue ("royal blue" or "cornflower")
Emerald — deep green with character
Emerald belongs to the beryl family, known for its deep green. Almost every natural emerald has internal inclusions — in emerald we call them "jardin" (French for garden), considered a sign of authenticity, not a flaw.
- Advantage: unique, warm green that no other stone matches
- Watch for: more fragile due to inclusions — avoid impacts; protective settings (bezel) are preferable
- Tip: for a daily ring, choose an emerald with fewer inclusions near the surface
Ruby — passion in red
Ruby is the red variety of corundum (sapphire is the same mineral family). The most prized shade is "pigeon blood" — a pure, vivid red with a slight blue undertone.
- Advantage: as hard as sapphire, a symbol of passion and strength, the rarity of large clean stones gives it prestige
- Watch for: quality natural rubies are expensive; many are heat-treated (which is acceptable and common)
Price: what you get for your budget
For the same budget, a colored gemstone often allows a larger, more visible stone than a diamond. A rough comparison for a ~1 carat quality stone:
- Emerald / sapphire: generally more affordable than a comparable diamond
- Ruby: can exceed diamond if it has top natural color
Our advice: set a budget, then choose the stone whose color speaks to you most. With colored gemstones, color (tone, saturation) matters more than size.
Certificate and treatment
With colored gemstones, treatment is common and mostly acceptable (e.g. heat treatment of sapphire and ruby, oiling of emerald). What matters is that the treatment is disclosed. Every colored gemstone we offer comes with a stone description and information on any treatment.
What's next?
If you're considering a colored engagement ring, we'll help you choose the right stone based on your budget, wear and desired look.
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Author: Kraguljevich Jewelry · Buyer's guide