Most green gems that reach the bench have been altered: emerald is oiled, some peridot is fracture-filled, tourmaline is routinely heated. Tsavorite garnet is the exception that has built its reputation. Mined in Kenya and Tanzania near the Tsavo East and West National Parks, it is a green grossular garnet colored by vanadium and chromium, and it reaches the cutter without heat, oil, irradiation or diffusion. For a manufacturer, that lack of treatment matters as much as the color: what you buy is what you get, with nothing to undo later.
The numbers behind the stone
Tsavorite registers 7 to 7.5 on Mohs, comfortably above the 6.5 floor for daily-wear stones. It is singly refractive, so it does not show the doubling that characterizes many tourmalines, and it has a high refractive index near 1.74, which gives it a livelier flash than its Mohs rating suggests. The trade-off is size: clean tsavorite over one carat is uncommon, and fine stones over two carats are rare enough to be quoted individually.
Color and pricing in real wholesale terms
The desirable color is a saturated, slightly bluish chrome green - close to a fine emerald but with a brighter, more electric flash. Stones leaning yellow or brown trade at a fraction of the vivid material. Because clean rough is scarce and the yield from rough to cut is low, fine tsavorite often costs more per carat than comparable emerald in small sizes, which surprises buyers who associate garnet with cheap red January birthstone stock. For a ring under 1 ct, the comparison to emerald is usually favorable once you add the zero-oil fact and the absence of fissure risk.
Inclusions a setter should expect
Tsavorite is not eye-clean by default. Common internal features are fine feather-like fractures near the girdle and small black graphitic or chromite spots. The feathers are the operational concern: they concentrate at the girdle and pavilion junction, exactly where a bezel or prong presses. A stone with a girdle-side feather should not be set in a tight bezel, because closing the wall transfers compressive force straight into that crack. Prong setting on the crown edges, with rounded tips, is the safer choice.
Cutting and setting rules factories follow
The stone is brittle in addition to being hard. Sharp corners on square or rectangular cuts chip when bumped, so manufacturers lean toward cushion, round, or oval cuts even when the design allows a princess. Pavilion depth is cut generously rather than very deep, because deep pavilions show the dark extinction typical of high-RI garnets and buyers read that as a dead stone.
On the bench, tsavorite takes standard ultrasonic cycles, but experienced shops skip the steam step on stones with visible feathers, because thermal shock can propagate a fine crack that a cold bath would not. Prong tips are rounded before closing; hard, sharp tips dig into the crown and create a chip the first time the ring is knocked.
Supply chain realities for wholesale buyers
Tsavorite rough comes from a relatively small mining belt in southern Kenya and northern Tanzania, and production is not consistent year to year. Drought affects artisanal mining, and larger mines have periodic output slowdowns. For a factory, this means two practical things. First, never build a seasonal program around a single parcel; lock in matched stock early, because a reorder three months later may not be available in the same color. Second, accept slight color variation between lots and disclose it to retail partners rather than trying to match impossible-to-match parcels.
Calibrated tsavorite - stones cut to standard millimeter sizes for catalog settings - is in tighter supply than calibrated sapphire or ruby. A 6 mm round in a nice green may be available, but a 5x7 oval with the same saturation can take weeks to source. Plan stone procurement before CAD, not after.
How it sits in a product line
Tsavorite slots neatly into a colored-stone program for buyers who want an emerald alternative that ships without disclosure paperwork. It pairs well with recycled 18k yellow gold for a rich look, and with platinum or white gold for a cooler green. Because untreated material does not require disclosure in most markets the way treated emerald does, it simplifies the retail side of your listing. It also wears well as an accent stone in pavé, provided the webs are built to standard pavé thickness. We stock calibrated tsavorite for repeat settings - see our colored gemstone catalog for available sizes and matching lots.
What to ask your rough supplier
Before committing to a tsavorite program, ask for: origin documentation (Kenyan versus Tanzanian material), weight retention estimates, and a written confirmation that the parcel is untreated. Reputable dealers state this freely. If a stone is priced suspiciously low relative to color, treat the price as a disclosure question, not as a deal.
The definition of carat weight and how it is measured are set out in the Wikipedia entry on carat weight.
Frequently Asked Questions
How do I verify a factory before placing a bulk order?
Request a production video, business license, export records and a paid sample run. A factory that accepts a 50-piece test order is usually a real manufacturer.
What payment terms do you offer?
30% T/T deposit with the balance against the bill of lading. This protects both sides on first orders and can move to net terms after a track record.
What is your normal reject rate?
3–5% under 10x loupe inspection for cast and set pieces. Defective units are replaced free in the next shipment.
Where is the factory located?
Wuzhou, Guangxi, China—the core lab-grown and moissanite manufacturing cluster. Shipments go via Guangzhou or Shenzhen ports.
