Buying jewelry at a major auction house requires registration, a buyer's premium of 20–28% on top of the hammer price, careful review of condition reports and lab certificates, and awareness of state sales tax. The process is straightforward once you understand how it actually works — but the costs surprise most first-time buyers.
How Do You Register to Bid at Christie's or Sotheby's?
Go to Christie's or Sotheby's and create an account. For high-value lots — anything over $50,000 — expect them to request a bank reference, a deposit, or proof of funds. This isn't optional. They'll hold your paddle until it clears.
If you're bidding on a major signed piece — a Cartier bracelet, a Bulgari Serpenti, a Harry Winston cluster — register at least a week in advance. I've watched people lose lots because their financial verification wasn't completed in time. Don't be that person.
Why Should You Request the Condition Report Before Bidding?
The catalog photograph is designed to sell. The condition report tells you what's actually going on. Request it for every lot you're serious about. It'll note chips, replaced stones, re-tipping, resizing evidence, and any structural issues.
For colored stones, I look at the certificates first. A no-heat Burma ruby should have a SSEF or Gübelin report confirming origin and treatment status. If the lot description says "Burma" but only has an older, less rigorous lab report, that's a red flag. I've passed on plenty of lots where the paperwork didn't match the claims.
For signed estate pieces, check whether original boxes, papers, or service records are included. Provenance matters. A Van Cleef Alhambra with archive extraction documentation is worth more than one without it. The condition report is where you find this out.
What Is the Buyer's Premium and How Does It Affect Your Total Cost?
This is where first-time buyers get stung. The hammer price is not what you pay. Both Christie's and Sotheby's charge a tiered buyer's premium — currently around 26% on the first $1,000,000, stepping down on amounts above that. On a $100,000 lot, you're adding roughly $26,000 just in premium.
Then there's sales tax. If you're buying in New York, that's an additional 8.875%. Some buyers arrange shipping to states with no sales tax, or use a resale certificate if they're a licensed dealer. I deal with this constantly — the premium plus tax on a significant lot can add 35% or more to the hammer price. Budget accordingly.
How Do You Actually Bid — In Person, By Phone, or Online?
All three work. I've done all three. In the room, you read the energy. You see who else is bidding. Phone bidding gives you anonymity and a specialist relaying the pace of the sale. Online bidding through the house platform is convenient, but there's a slight delay that can cost you on competitive lots.
Set your maximum before the sale. Not during. Auction rooms are designed to push you past your number. The adrenaline is real. I've been doing this for decades and I still set a hard ceiling on every lot before the gavel drops.
What Happens After You Win a Lot?
You'll receive an invoice within a day or two. Payment is typically due within 30 days. Wire transfer is standard for high-value purchases. Once payment clears, you arrange pickup or shipping — and yes, insure it immediately.
One thing people don't anticipate: if you bought a colored stone and want an independent re-certification — say, sending a sapphire to GIA for your own report — do it quickly. Most houses have a limited window for returns if something material doesn't match the catalog description. Read the terms of sale. They're legally binding.
The auction houses are incredible sources for museum-quality signed jewelry and important colored stones. I've bought and sold through Christie's, Sotheby's, Bonhams, and Phillips for years. But they're not retail. There's no hand-holding. Know the rules before you raise the paddle.
Q: How much does it really cost to buy jewelry at auction?
A: Add 26–28% buyer's premium plus local sales tax to the hammer price. In New York, that means a $100,000 hammer can become $135,000 or more out the door. Always calculate your all-in cost before bidding.
Q: Can you return jewelry bought at Christie's or Sotheby's?
A: Only under very specific circumstances — typically if the lot is proven to be materially different from the catalog description. You usually have a limited rescission window. Read the conditions of sale carefully before you bid.
Q: Do auction houses guarantee the authenticity of signed jewelry?
A: They do their due diligence, and catalog descriptions carry legal weight. But I always verify independently. For a signed Cartier or Bulgari piece, request archive confirmation. For colored stones, get your own SSEF, Gübelin, or GIA report.
Q: Is it better to buy jewelry at auction or from a dealer?
A: Depends on what you're after. Auction can yield extraordinary pieces at competitive prices — or you can overpay in a bidding war. A trusted dealer like myself offers vetted inventory, certified stones, and no buyer's premium. Both channels have their place.
Lawrence Paul
I'm at 44 West 47th Street in New York's Diamond District most days. If you're looking for something specific or want to sell, reach me at info@spectrafinejewelry.com or call 212-354-3456.