Black Starr & Frost Unheated Ceylon Sapphire Gold Stick Pin, 8 Carats AGL
Rare Black, Starr & Frost Stick Pin with AGL Prestige-Certified Unheated Ceylon Sapphire
This exceptional Black, Starr & Frost gold stick pin centers on an approximately 8-carat natural blue sapphire, beautifully fashioned as an oval cabochon. The sapphire is accompanied by an AGL Prestige Gemstone Report, identifying the stone as a natural sapphire of Ceylon / Sri Lanka origin with no gemological evidence of heat and no clarity enhancement.
The sapphire measures approximately 10.4 × 9.1 × 7.8 mm and displays the smooth, glowing presence associated with fine cabochon sapphires. Its documented unheated Ceylon origin makes the stone especially desirable, as non-heated sapphires of notable size are increasingly scarce in the market. The AGL Prestige Gemstone Report also notes the sapphire’s degree of rarity as rare, further strengthening the collectible importance of this jewel.
Created by Black, Starr & Frost, one of America’s historic luxury jewelry houses, this stick pin combines distinguished American craftsmanship with a documented gemstone of notable quality and rarity. Elegant, refined, and highly collectible, it is a meaningful jewel for collectors of signed antique and vintage jewelry, fine sapphires, and rare stick pins.
Collectors interested in this rare unheated Ceylon sapphire stick pin are welcome to contact DSF Antique Jewelry for further details or a copy of the AGL Prestige Gemstone Report.
Key Features
• Created by Black, Starr & Frost
• Antique gold stick pin
• Set with an approximately 8-carat natural blue sapphire
• Unheated Ceylon / Sri Lanka sapphire
• Oval cabochon sapphire
• Sapphire measures approximately 10.4 × 9.1 × 7.8 mm
• Accompanied by AGL Prestige Gemstone Report No. 1156760
• AGL Prestige Gemstone Report states no gemological evidence of heat
• No clarity enhancement
• AGL notes the sapphire’s degree of rarity as rare
• Collectible signed American luxury jewel
Technical Details
Maker: Black, Starr & Frost
Metal: Gold
Gemstone: Natural blue sapphire
Sapphire Weight: Approximately 8 carats
Sapphire Origin: Ceylon / Sri Lanka
Sapphire Treatment: No gemological evidence of heat
Clarity Enhancement: None
Shape: Oval cabochon
Measurements: Approximately 10.4 × 9.1 × 7.8 mm
Report: AGL Prestige Gemstone Report No. 1156760, dated May 22, 2026
Jewelry Type: Antique stick pin
Condition: Excellent
This piece is accompanied by a gemological report. Learn more about DSF’s approach to gemstone reports and jewelry documentation.
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The DSF Promise
Buy with confidence. Every piece is backed by:
• Authenticity — examined and verified before listing
• Condition — carefully inspected and honestly described
• Insured shipping — fully insured, signature required
• 32-day returns — available on eligible, unaltered items
• Private appointments — available in New York
• Experience — over 50 years of fine jewelry expertise
How do I know a piece is authentic, and can I trust DSF?
Buying fine jewelry online takes trust, especially at this level. DSF Antique Jewelry is a New York–based dealer with over 50 years of fine jewelry expertise. Every piece is examined for authenticity and condition before it is listed — we assess hallmarks, maker's marks, metal content, gemstones, and construction consistent with the stated period or designer. For signed pieces such as Cartier, Buccellati, or Van Cleef & Arpels, we verify maker's marks and signatures. We're glad to send additional photographs of any hallmark, or speak with you directly, before you decide.
Why does antique gold look different, and is surface wear normal?
Antique pieces were often made in gold standards less common today, such as 15ct (used in Britain only between 1854 and 1932), 9ct, or higher-karat continental gold, which give a warmer tone than typical modern 14k. Light surface wear, softened edges, and a gentle patina are normal and expected on antique jewelry — they reflect the age and authenticity of the piece, not flaws. We describe the true condition of every item honestly in its listing.
What do the hallmarks and maker's marks mean?
Hallmarks are small stamped marks that identify the metal standard, and often the maker, assay office, and date. They are one of the best tools for authenticating antique jewelry. We identify and explain the marks we find on each piece in its description, and we're happy to send close-up photographs of any hallmark on request so you can see exactly what you're buying.
Can pieces be resized or adjusted?
It depends on the piece. Many antique rings can be resized, but bands with all-around engraving, thin shanks, or gemstones near the base may be limited in how far they can safely go, and some pieces are best left as-is to preserve their integrity. We list each item's measurements as they currently are. If you're unsure whether something can be safely adjusted, contact us before buying and we'll give you an honest assessment for that specific piece.
How should I care for and store fine jewelry?
Clean gently with a soft cloth, avoid harsh chemicals, ultrasonic cleaners, and chlorine, and store pieces separately so they don't scratch one another. Remove rings and bracelets for heavy manual tasks. Antique gold is softer than modern alloys, so period pieces are best enjoyed with normal care. Treated well, fine antique jewelry lasts for generations — many of our pieces are already a century or more old and still beautiful.
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