Optional. Fill asking price + maison to compute the multiple, premium, and market benchmark.
Intrinsic gold (melt)
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Multiple of gold
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Prepared signature line
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18K REFERENCE
LIVE
Per gram · 18k (750) · dealer spread
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USD / g (18k)
Buy —Sell —
Melt floor ——
7-DAY TREND
Open
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Now
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Batch
Batch uses the same spot, FX, and currency from the Gold tab.
Item
Wt
Purity
Signature
Melt
Buyback
Asking
Over gold
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No items yet. Add items above.
Total
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Batch notes (optional)
Auction Estimator
Hammer + buyer's premium only (no VAT/sales tax). 12 houses with tiered schedules. Switch between forward (hammer → total) and reverse (budget → max bid).
Applies to full hammer (not tiered)
Buyer's premium:—
Total buyer pays:—
Effective premium:—
≈ USD equivalent:—
Premium breakdown
Tiered by hammer brackets
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Rates verified
Gem Carat Estimator
Indicative estimate from measurements using gemological specific gravity and standard cutting assumptions. 14 stones, 11 shapes. Actual carat varies by cut and depth.
If Depth (mm) is omitted, depth is estimated from Depth %.
Estimated carat:—
Indicative range:—
Factor:—
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Gold Regime Index
5-factor macro model from FRED (St. Louis Fed). Real rates (30%) · USD (25%) · Inflation (20%) · Breakevens (15%) · VIX (10%).
Database
Every Odeon piece — search by brand, type, stone, or period; click for detail; select pieces to compare.
Watchlist — Opportunity Scanner
Scores upcoming lots against the Comp Engine buy-range algorithm. Requires Comp Engine data to be loaded first.
Upcoming Sales
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Auction Comps
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eBay Scout
Search live eBay listings and compare each against your auction P50 comp to spot deals.