One-of-a-Kind Colombian and Zambian Emerald Station Necklace 10.46tcw 18kt Yellow Gold

This is a genuine one-of-a-kind piece, not part of any production line and not available elsewhere. The necklace centres 10.46 total carats of natural Colombian and Zambian emeralds set as a station design along an 18-inch 0.75mm solid cable chain in 18kt yellow gold. The two origin sources represented in this piece, Colombia and Zambia, are the two most prized commercial sources of fine emerald in the world. Combining stones from both origins in a single substantial necklace is uncommon, even among high-end fine emerald jewelry. At 18kt purity (750), the gold itself is finer than the more common 14kt fine-jewelry tier, and at 10.46 total carat weight of natural emerald the piece sits in true heirloom collector territory. Once this piece is sold, no identical replacement is available, the specific stones, the specific cuts, the specific arrangement, and the specific 18kt yellow gold setting come together only here.

Necklace at a Glance

• Total carat weight: 10.46tcw of natural emeralds
• Stone origins: Colombian and Zambian (the two most prized fine emerald sources)
• Cut: Emerald-cut emeralds
• Metal: 18kt yellow gold (purity 750)
• Necklace length: 18.00 inches
• Chain: Solid 0.75mm cable chain (included)
• Style: Station-design necklace
• Status: One-of-a-kind, not part of any production line
• SKU: TAndCO-0081

About the Colombian and Zambian Emeralds

The 10.46 total carats of emeralds in this necklace are natural mined stones from two geographic origins: Colombia and Zambia. Colombian emeralds (sourced principally from the Muzo, Chivor, and Coscuez mining regions in the eastern Cordillera of the Andes) are the historical reference standard for fine emerald, prized for the slightly bluish-green colour saturation that defines the most desirable stones in the trade and used in the most important emerald jewelry of the past five centuries. Zambian emeralds (sourced principally from the Kafubu mining region in the Copperbelt province) are the more recent rival source, recognised since the 1970s for stones with stronger green colour, fewer inclusions on average, and high clarity at fine-jewelry sizes. Combining stones from both origins within a single piece is uncommon and adds to the one-of-a-kind character of this necklace, the visual contrast across the stations reflects the two origin sources rather than reading as visually uniform. All stones are natural mined emeralds, not synthetic, lab-grown, or simulant. Like virtually all fine emeralds, these stones are likely treated with cedar oil or comparable colourless filler to enhance clarity, this is universally accepted trade practice and is not the same as a synthetic origin or a colour-altering treatment. Emerald is a variety of beryl coloured by trace chromium and vanadium, registering 7.5 to 8 on the Mohs hardness scale.

About the 18kt Yellow Gold Station Setting

The necklace is fabricated in 18kt yellow gold (purity 750), distinct from the more common 14kt purity (585) used across most fine-jewelry pieces in the US market. At 18kt purity, the gold contains 75% pure gold by weight rather than 14kt's 58.5%, the colour is richer and more saturated, the metal value per gram is significantly higher, and the alloy is preferred by collectors and heritage-jewelry buyers for the warmer gold tone and higher fineness. The stones are arranged in a station design across the 18-inch length of the necklace, the emeralds sit at intervals along the chain rather than continuously touching as on a tennis necklace. Station designs work particularly well at this carat weight because the spacing lets each individual stone present visually rather than blending into a continuous line, the natural variation in colour and inclusion pattern between Colombian and Zambian stones is more visible in this format than in any other layout. The 0.75mm solid cable chain is included with the necklace, cable chain is the classical fine-jewelry chain for station and pendant pieces, the slim profile lets the emeralds remain the visual focus.

Why Shop With Treasured & Co.

• ✔ Free domestic shipping on every order, fully insured
• ✔ Affirm financing at checkout, multi-payment plans available on this price tier
• ✔ In-person viewing at our Astoria, NY showroom: 30-06 Steinway St, Astoria, NY 11103
• ✔ Strongly recommended for OOAK pieces, photographs cannot fully convey fine emerald colour saturation
• ✔ 30-day return policy, lifetime cleaning and polishing for one-of-a-kind pieces
• ✔ Family-owned jeweler since 1990, every piece inspected by our master goldsmith

What Makes This a True One-of-a-Kind Piece

True one-of-a-kind jewelry pieces (also called OOAK or one-off) are pieces fabricated as single individual works rather than as part of a production line. The specific stones, the specific arrangement, the specific cut layout, and the specific setting all come together only in this single piece. When a OOAK piece sells, no identical replacement is available, a buyer wanting a similar piece would need to source different stones, fabricate a new setting, and accept that the result will not match the original exactly. This particular necklace combines mixed-origin Colombian and Zambian emeralds (a deliberate origin diversity that's uncommon in production fine-jewelry where consistency typically takes precedence over character), 18kt yellow gold construction (above the 14kt standard for most US fine jewelry), 10.46 total carats of fine natural emerald (true heirloom-tier substance), and a station format (favoured for showcasing individual stones). For OOAK buyers, the rarity is the value proposition, the necklace functions as both wearable jewelry and a single-piece collection addition. We encourage in-person viewing at our Astoria, NY showroom for buyers considering this piece, photographs convey the design but the colour saturation and surface character of fine emerald, particularly mixed-origin emerald, is best evaluated in hand.

Frequently Asked Questions

Are these natural emeralds?

Yes. The 10.46tcw of emeralds are all natural mined stones, not synthetic, lab-grown, or simulated. The stones are sourced from two prized origins: Colombia and Zambia, the two most-recognised commercial sources of fine emerald in the world. Like virtually all fine emeralds, the stones are likely treated with cedar oil or comparable colourless filler to enhance clarity, this is universally accepted trade practice and is not the same as a synthetic origin or a colour-altering treatment.

What does one-of-a-kind mean for this necklace?

True one-of-a-kind jewelry refers to pieces fabricated as single individual works rather than as part of a production line. The specific stones, the specific cut arrangement, and the specific 18kt yellow gold station setting come together only in this piece. Once it sells, no identical replacement is available, this is the rarity that defines the piece's value beyond the gold and stone content alone. We strongly encourage in-person viewing at our Astoria, NY showroom for buyers considering OOAK pieces at this tier.

Why combine Colombian and Zambian emeralds in one piece?

Colombian and Zambian emeralds occupy different positions on the fine-emerald colour spectrum: Colombian stones tend toward a slightly bluish-green saturation prized as the historical reference standard, Zambian stones tend toward stronger pure green colour with different clarity characteristics. Combining stones from both origins within a single piece is uncommon (production jewelry typically prioritises visual uniformity), the deliberate origin diversity is part of what makes this necklace one-of-a-kind, the variation between stations reads as character rather than mismatching.

Is the 18kt gold real?

Yes. The necklace is real solid 18kt yellow gold (purity 750), not gold-plated, gold-filled, or 14kt. 18kt is a higher fineness than the 14kt purity (585) used in most US fine-jewelry pieces, the gold contains 75% pure gold by weight rather than 14kt's 58.5%, and the colour is richer. 18kt is the standard for European fine jewelry and is preferred by collectors and heritage-jewelry buyers.

Can I view this necklace in person before purchasing?

Yes, and we strongly recommend it for OOAK pieces at this price tier. The necklace is available for in-store viewing at Treasured and Co., 30-06 Steinway St, Astoria, NY 11103. Store hours are Monday through Saturday 10:30AM to 6:30PM and Sunday 11:30AM to 5:30PM. Call (718) 956-0001 to confirm availability before visiting. The colour saturation and surface character of fine emerald, particularly mixed-origin emerald, is best evaluated in hand rather than from photographs alone.