ENCYCLOPEDIA · DAVID SAAD · SKYJEMS

Colombian Emerald — No Oil, Lab-Certified

Key concepts

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A no-oil Colombian emerald is graded "None" on the four-tier clarity-enhancement scale (None / Minor / Moderate / Significant). Major labs — AGL, GIA, SSEF, Gübelin — issue this designation only after thorough microscopic examination confirms no detectable filler in surface-reaching fissures. No-oil Colombian emerald is the rarest commercial category in the variety and trades at multiples of even minor-oil pricing. Skyjems' primary inventory in this exact slice is currently empty — no-oil Colombian emerald is a curator-sourced category through the Bogotá and Geneva dealer networks.

Why no-oil is rare for Colombian specifically

Colombian rough is naturally fissured — the geology of Muzo, Chivor, and Coscuez deposits produces emerald with abundant inclusion patterns. Most rough is oiled at the cutting house as standard practice. Stones that emerge from the cutting process clean enough to pass lab examination without enhancement are exceptional — typically only the highest-clarity rough yields no-oil finished stones.

Pricing context

At equivalent colour, size, and origin, no-oil Colombian emerald typically prices 5–10× a comparable minor-oil stone, and substantially more above 3 carats. The auction market treats no-oil as a distinct collector category — Christie's and Sotheby's lot listings highlight the no-oil designation prominently.

Skyjems sourcing approach

No-oil Colombian emerald is curator-sourced. Lead times are 4–12 weeks for documented requests through the Bogotá-Geneva dealer network. Authentication via AGL, GIA, SSEF, or Gübelin lab letter is required. For more accessible Colombian emerald in active inventory, see the minor-oil and major-oil tiers.

Private viewings and bespoke

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