Part of Gemstone Comparisons
KEY NUMBERS · TSAVORITE VS. EMERALD
5–10x
nice Colombian emerald vs. tsavorite (one dealer, 2014)
3 ct+
where clean tsavorite becomes rare
1967
tsavorite discovered in Tanzania
Tsavorite is a green grossular garnet; emerald is green beryl. Both owe their color to chromium and vanadium, and in a ring they can look surprisingly similar.
Tsavorite is bright, tough in daily wear and usually sold untreated. Most emeralds are clarity-enhanced with oil or resin, according to GIA. Tsavorite generally costs less: in 2014, dealer Raja Shah told Rapaport a nice Colombian emerald would still be five to ten times its price.
TL;DR
Tsavorite: grossular garnet, Mohs 7 to 7.5, singly refractive, high brilliance, usually untreated, mostly small.
Emerald: beryl, Mohs 7.5 to 8 but often fractured; inclusions, the "jardin", are normal, and most stones are clarity-enhanced.
Dealers describe clean tsavorite above about 3 carats as rare; emeralds come in a wider range of sizes.
Price: one dealer quoted a nice Colombian emerald at 5x to 10x tsavorite in 2014, and another said tsavorite values had tripled or quadrupled in the five years before.
Emerald has the history and the auction record. Tsavorite has brilliance and no routine treatment.
Two Different Minerals
Tsavorite: a young gem
Tsavorite is the green variety of grossular garnet. Geologist Campbell Bridges found it in northeastern Tanzania in 1967, then across the border in Kenya near Tsavo National Park. Tiffany & Co. named and launched it in 1974.
Faceted tsavorite garnets from Tanzania. Photo: Adam Kelliher, Rubble Rock and Gem, CC BY-SA 4.0, via Wikimedia Commons.
Emerald: the classic
Emerald is beryl colored by chromium and/or vanadium, mined for millennia from Egypt to Colombia. Its signature is its inclusions, which the trade calls the "jardin" (garden). A clean emerald is rare.
Tsavorite vs. Emerald, Side by Side
Property | Tsavorite | Emerald |
|---|---|---|
Mineral | Grossular garnet | Beryl |
Hardness (Mohs) | 7 to 7.5 | 7.5 to 8 |
Toughness in wear | Good; no cleavage | Fair to poor; fractures make it vulnerable to knocks |
Refractive index | About 1.74 (singly refractive) | About 1.57 to 1.58 (doubly refractive) |
Look | Bright, lively, high dispersion; often slightly yellowish green | Softer, velvety glow; pure to slightly bluish green |
Clarity | Often eye-clean in small sizes | Inclusions expected |
Treatment | Almost never treated | Clarity enhancement (oil, resin) is the norm |
Typical sizes | Mostly under 2 ct; clean over 3 ct is rare | Available in a wide range of sizes |
Main sources | Kenya, Tanzania | Colombia, Zambia, Brazil, Afghanistan |
Tsavorite vs. Emerald Price
Reference | What it says |
|---|---|
Retailer comparison | Tsavorite is more affordable than emerald, with no figure given (Emeralds.com, a seller) |
Dealer quoted by Rapaport, 2014 | A nice Colombian emerald would still be 5x to 10x the price of tsavorite |
Large fine tsavorite | Adam Gil, Jerry Gil & Co., 2014: fine tsavorite above 5 carats at $9,000 to $10,000 per carat. We found no reliable public price list for either stone across all sizes |
Trend | In 2014, one dealer told Rapaport tsavorite values had tripled or quadrupled in five years |
Size changes the comparison. Under 1 carat, tsavorite is plentiful. Above 3 carats with good color and clarity, dealers describe it as much rarer. These quotes are from 2014 and from people in the trade, so treat them as reference points, not a current price list. For named emerald results, see Emerald Price Per Carat.
Our take: gem for gem, tsavorite offers brilliance, durability and no routine treatment at a lower price. Emerald's premium comes from centuries of demand and a long auction record. Which matters more depends on why you are buying; we do not give investment advice.
This is exactly the kind of detail a sales pitch leaves out.
Every Tuesday, we publish what's actually moving in the colored stone market: auction results, producer disclosures, and the lab language that separates a good stone from a good story.
Most emeralds on the market are clarity-enhanced, according to GIA: surface-reaching fractures are filled with oil (traditionally cedarwood) or resin. Labs grade the extent from none to significant. An emerald with no enhancement is rare.
Tsavorite is usually sold untreated. For buyers who care about treatment, that is its strongest argument. For the full emerald picture, read What Is Emerald? and Minor Oil Emerald: F1, F2 and F3.
How to Tell Tsavorite From Emerald
Brilliance: tsavorite's higher refractive index gives it more sparkle and fire; emerald looks softer and more velvety.
Inclusions: a vivid green stone that is eye-clean is more likely tsavorite; visible jardin points to emerald.
Polariscope: tsavorite is singly refractive (though garnets can show anomalous effects); emerald is doubly refractive.
Refractometer: about 1.74 for tsavorite vs. about 1.57 to 1.58 for emerald. This settles it.
Which Should You Buy?
Choose tsavorite if
You want a vivid green ring stone for daily wear.
You want a stone that is usually untreated.
Your target size is under 2 carats, where tsavorite is easiest to find.
Choose emerald if
You want the classic, most recognized green gem.
Auction recognition and a long market history matter to you.
You want a larger stone; emeralds come in a wider range of sizes.
Another green alternative is demantoid, also a garnet, with even higher dispersion. Tsavorite is a garnet too: see What Is Garnet?
FAQ
Is tsavorite rarer than emerald? In large, clean sizes, dealers say yes, though the loudest claims come from people who sell it. In small sizes, tsavorite is plentiful.
Is tsavorite cheaper than emerald? Generally yes. In 2014, one dealer put a nice Colombian emerald at five to ten times the price of tsavorite.
Is tsavorite a real gemstone? Yes. It is a natural green grossular garnet, discovered in 1967 and commercialized by Tiffany & Co. in 1974.
Why is tsavorite so expensive? Fine, clean material in larger sizes is scarce, according to dealers quoted by Rapaport, and mining in Kenya and Tanzania is small-scale.
Is tsavorite a good investment? We do not give investment advice. One dealer told Rapaport in 2014 that values had tripled or quadrupled in five years, but dealer quotes do not establish a reliable return.
Is tsavorite good for an engagement ring? Yes. At Mohs 7 to 7.5 with no cleavage, it handles daily wear better than most emeralds.
Green stones, priced in context.
Emerald auctions, garnet trends, and the treatment grades that move prices. Every Tuesday.
Useful Sources
Rapaport, True Green: dealer views on tsavorite pricing.
GIA, Garnet: grossular and tsavorite.
GIA, Emerald: quality factors and clarity enhancement.
Emeralds.com, Emeralds vs Tsavorite: a retailer's comparison (seller perspective).
Updated November 8, 2026. Carat Brief is editorial and is not investment advice.