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A natural 1.09 carat tsavorite garnet in an octagonal shape, completely untreated and documented on AGCL Report #M2513970. Tsavorite is a calcium aluminum silicate (grossular garnet) colored by trace vanadium and chromium, producing vivid jewel-tone greens that rival or surpass the finest emerald in color intensity. It was discovered in 1967 in Kenya's Tsavo region and has never required treatment of any kind — no heating, no oiling, no filling. The octagonal outline gives this 1.09 ct stone a bold, geometric presence that diverges from the oval-cushion majority.
Expert Opinion
"Tsavorite almost never comes to market in an octagon — cutters overwhelmingly favor oval or cushion outlines to protect weight from this notoriously included rough. Seeing a 1.09 ct stone cut into a clean, corner-true octagon tells me the cutter had a rough crystal clean enough, and a color saturated enough, to justify sacrificing yield for geometry. That's a deliberate, confident cutting decision, and the vivid green saturation on this stone backs it up — it's exactly the kind of jewel-tone that tsavorite collectors chase." — Ahmed Shareek
Rarity Analysis
- Tsavorite itself is a supply-constrained gemstone, mined from a narrow geographic band spanning Kenya and northern Tanzania — there is no large-scale global supply to draw on, unlike more widely distributed garnet varieties.
- The octagonal cut is a genuine format rarity for this species; tsavorite rough is typically cut oval or cushion to preserve carat weight, so an octagon of this size represents a deliberate trade-off in favor of geometry over yield.
- The color is vivid green with strong saturation, at the upper end of what the species produces.
- Clarity is honestly graded as Slightly Included — this is not a flawless stone, and inclusions may be visible under close inspection, which is typical and expected for natural tsavorite of this size.
- Treatment is not a variable here: tsavorite is never treated as a species, so there is nothing to verify or disclose on that front — every genuine tsavorite is untreated by nature, not by exception.
- Combined effect: a supply-constrained species, cut into a rare format, with vivid saturation and full transparency about its natural inclusions and independently documented on the AGCL report — together these place this stone outside the ordinary run of tsavorite offered at this carat weight.
Buying Guidance
- For tsavorite, the verification that actually matters is species, not treatment — since tsavorite is never treated, a lab report's real value is confirming this stone is genuine grossular garnet (tsavorite) rather than a lower-value green garnet or dyed material sold under the tsavorite name. The AGCL report on this stone serves that purpose.
- Note that origin (Kenya) is the store's own assessment, not a lab-confirmed finding — the AGCL report does not address country of origin.
- At 7–7.5 on the Mohs scale, tsavorite is notably softer than sapphire (9), so everyday-wear settings should account for that difference in durability.
- A protective setting such as a bezel is a sensible choice for this stone, particularly given the octagon's corners, which are more exposed to impact than a rounded outline.
- Try Before You Buy: request additional photos or a video call to see the stone's color and geometry in hand before committing.
Learn More About This Gemstone
Gemstone Data — At a Glance
| Item # |
CG8360 |
| Carat Weight |
1.09 ct |
| Species / Variety |
Grossular Garnet — Tsavorite |
| Shape / Cut |
Octagon, Mixed Brilliant |
| Dimensions |
5.48 × 5.34 × 4.62 mm |
| Color / Intensity |
Vivid Green |
| Phenomenon |
None |
| Treatment |
Untreated (tsavorite is never treated) |
| Origin |
Kenya — store's own assessment, not addressed by the AGCL report |
| Clarity |
Slightly Included |
| Transparency |
Transparent |
| Hardness |
7–7.5 (Mohs) |
| Certification |
AGCL Report #M2513970 |
Features
- SKU: CG8360
- Variety: Tsavorite Garnet
- Weight: 1.09 Carats
- Dimensions: 5.48 x 5.34 x 4.62 mm
- Shape: Octagon
- Cut Style: Mixed Brilliant
- Origin: Kenya (store's own assessment; not addressed by the AGCL report)
- Treatment: Untreated
- Color: Vivid Green
- Clarity: Slightly Included — inclusions may be visible under close inspection
- Transparency: Transparent
- Hardness: 7–7.5 on the Mohs scale
- Certification: AGCL (Arctic Gem Certification & Laboratory), Report #M2513970
This 1.09 ct octagon-shaped tsavorite has been hand-selected for the vividness of its green and the clean geometry of its outline — a combination that gives it a modern, architectural presence uncommon in tsavorite, which is typically cut oval or cushion for maximum weight retention.
One of a Kind
This is a single natural gemstone, not a lab-created or mass-produced stone. No two natural tsavorite garnets are identical — the exact stone pictured is the exact stone you receive.
Care
Clean with warm soapy water and a soft brush; avoid ultrasonic cleaners and harsh chemicals. Although durable at 7–7.5 on the Mohs scale, store separately from other jewelry to prevent scratches and impacts.
Perfect Uses for this 1.09 ct Tsavorite Garnet
- Geometric engagement ring center stone
- Custom pendant in a four-prong setting
- Collectors of unusual-shape tsavorite
- Modern minimalist jewelry design
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