Ruby Price Per Carat
Ruby is currently worth $100 to $15,000+ per carat depending on quality.
Ruby has the widest quality-driven price spread of any major gem: commercial heated stones trade for under $500 per carat while fine unheated Burmese 'pigeon blood' rubies exceed $100,000 per carat at auction. Color purity, treatment status, and origin do the heavy lifting — carat weight then compounds everything, because clean natural rubies over 2 carats are genuinely scarce.
RubyValue Chart by Carat & Quality (2026)
Retail price per carat for loose stones, by size bracket and quality tier.
| Carat | Commercial (heated, included) | Fine red (good clarity) | Top / pigeon blood |
|---|---|---|---|
| Under 0.5 ct | $50–$300 | $500–$1,200 | $1,200–$3,000 |
| 0.5–1 ct | $100–$500 | $800–$2,500 | $2,500–$7,000 |
| 1–2 ct | $300–$1,200 | $2,000–$6,000 | $7,000–$15,000 |
| 2–3 ct | $500–$2,000 | $4,000–$10,000 | $12,000–$30,000 |
| 3–5 ct | $800–$3,000 | $8,000–$20,000 | $25,000–$80,000 |
| 5+ ct | $1,500–$5,000 | $15,000–$40,000 | $50,000–$200,000+ |
Natural ruby, per carat. Certified unheated stones add 50–300% over these heated-stone ranges; lead-glass composite 'rubies' fall outside this table entirely at $10–$50 per carat.
What Drives Ruby Value
The factors dealers actually price on — and how each one moves the per-carat number.
Color: the pigeon-blood premium
Pure vivid red with no brown or orange — ideally with strong red fluorescence — defines the top tier. Each step toward pinkish, purplish, or dark garnet-like red cuts the per-carat price substantially.
Treatment status
Standard heat is accepted; certified unheated stones trade at 2–4× heated equivalents. Lead-glass filling is a different universe — composites are worth a few dollars per carat regardless of size.
Origin
Burmese (Mogok) origin carries the strongest premium, with fine Mozambique stones closing the gap in recent years. Thai/Cambodian material trades lower due to darker tones.
Clarity and silk
Eye-clean rubies are far rarer than eye-clean sapphires. Fine silk that doesn't dull the stone is tolerated — it can even prove natural origin and scatter light attractively.
Size scarcity
Natural rubies over 3 carats with fine color are museum-grade rare, so per-carat prices accelerate with weight faster than for almost any other colored gem.
What Is YOUR Ruby Worth?
Charts show the market — your stone has its own carat, color, clarity, and treatment story. Get a personalized estimate in under a minute.
These prices only apply to genuine ruby
Imitations and undisclosed synthetics trade at a tiny fraction of these figures. Run the ruby real-vs-fake tests before valuing or selling your stone.
Ruby Price Questions
Get answers to common questions about rock identification, rockhounding, and using our platform.
Heated commercial stones run $300–$1,200; fine red stones with good clarity bring $2,000–$6,000; top pigeon-blood color reaches $7,000–$15,000 per carat. Certified unheated Burmese examples can go higher still. Glass-filled composite rubies of any size are worth only a few dollars per carat.
The trade's name for the finest ruby color: vivid, pure red with strong fluorescence and no visible brown or blue. Labs like GRS and Gübelin apply it as a formal color grade. The designation alone can double a stone's per-carat price.
Substantially — typically 2–4× a heated stone of equal appearance, and more at the top end, because unheated fine color is rarer every year. The premium only applies with a lab certificate (GIA, AGL, Gübelin, SSEF) stating no indications of heating.
The usual culprits: lead-glass composite material (worth dollars per carat), very dark or purplish color, heavy inclusions, or synthetic origin. Check our guide on how to tell if a ruby is real, then get an estimate with the ruby value calculator before paying for a formal appraisal.
More RubyTools & Guides
Ruby Value Calculator
Estimate what YOUR ruby is worth in under a minute.
Is My Ruby Real?
Ruby prices only apply to genuine stones — test yours first.
Ruby Identification Guide
Properties, colors, varieties, and photos in the encyclopedia.
Free Gemstone Appraisal
Photo-based appraisal estimate for any gemstone.