Intrinsix for jewellers and gold buyers

The problem

One piece, five honest numbers, and nobody explains the gap

A customer arrives with a figure in their head. It came from an insurance valuation, a shop window, or an aunt. It is almost never the number you are about to say out loud, and the next ten minutes go on explaining why.

The arithmetic underneath is not hard. It is just tedious, and three things go wrong in it every week.

Gross weight is not gold weight. A 12 g ring with stones can hold 5 g of metal.

Carat weight alone says nothing. A 1 ct diamond runs from about €700 to €12,000.

Treatment collapses value. A glass-filled ruby is worth less than the gold around it.

Lab-grown is everywhere. Chemically identical, and 10 to 20 % of the price.

750 75 % Au 585 58.5 % 375 37.5 % 925 sterling PT950 platinum

How it works

Three inputs, one screen, about a minute

STEP 01

Enter the piece

Metal, hallmark, net weight without the stones. Stones by carat, natural or lab-grown. Loose stones with no metal at all are fine.

STEP 02

Prices arrive by themselves

The metal spot price is fetched live and refreshes on its own. Stone prices come from a wholesale matrix, and you can override any of it by hand.

STEP 03

Read the ladder

Five values side by side, from melt floor to new retail, so the difference you are explaining to a customer is on the screen instead of in your head.

The input screen: metal, karat, net weight and stones — Entering a piece

The result screen showing the five-value ladder and the maximum bid — The five values

The first-run explanation of what the app does — First run

Buying at auction

The hammer price is not the price

If you buy stock at auction, the app adds what the listing leaves out and returns the maximum you should bid, not the maximum you could.

Paste an auction lot link and the specifications are extracted for you; you confirm every value before it counts. On a €1,000 hammer, buying inside the EU:

What €1,000 hammer really costs
Line	Typical
Hammer	€ 1,000
Buyer's premium, 9 to 25 %	+€ 90 to 250
VAT on the premium	+21 % of that
Shipping and insurance	+€ 15 to 60
From outside the EU: import VAT and duty	+21 % and up
Landed, non-EU seller	+35 to 45 %

What it costs

The arithmetic is free. Always.

Free

€ 0

Every calculation, unlimited
Live metal spot prices
Stones at wholesale per carat
All five values, every time
No account required

Pro

€ 14.99 / month

Import a lot from its link, extracted for you
Saved watchlist across pieces
Cancel in the App Store, any time
Free for one import, to see it work first

Nothing is sold on the free tier and there is no advertising anywhere in the app. If the counter side of the work is all you need, you never pay.

For your website

The same calculator, on your own page, with your name on it

One line of HTML puts an embeddable version on your site: your shop name above it, your accent colour, prices refreshing themselves every five minutes.

Free, for any shop, now and later. The only condition is the credit line underneath. That is the entire deal.

A customer who has already seen a realistic number arrives ready to talk, instead of arriving with a figure that came from nowhere.

Build your one line of HTML

Goud & Zilver Amsterdam

Metal content€ 536.63

Stones€ 950.00

Fair price€ 1,486.00

Valuation by Intrinsix · live metal prices

Where it helps, and where it does not

The limits, before you find them yourself

Metal at the live spot price, any purity, net of the stones.

−

Brand premiums. A signed piece is worth more than its parts, and the app does not know by how much.

Diamonds by the four Cs, natural and lab-grown, at wholesale per carat.

−

Old cuts and antique work. No modern grade describes them properly.

All auction costs: premium, VAT on the premium, import VAT and duty, shipping.

−

Detecting treatment. It prices what you tell it the stone is.

Loose stones with no metal, and scrap with no stones.

−

Replacing a valuer. It is the arithmetic under the judgement, not the judgement.

Try it against a piece you have already valued

That is the only test worth running: put something through it where you already know what you paid, and see whether the number holds.

Intrinsix on the App Store Build the widget for your site Read the buyer's guide