Modules · Customer purchases

Buying is the last thing in your shop still done on paper.

Sales, repairs, invoices, stock: all of it is on the system. Then someone walks in with their grandmother's gold and out come the scale, the calculator and the receipt book. Gem Logic gives the purchase four checkpoints and one record: the customer, the items, the identity, the money.

Live spot price, your per-metal margin ID and signatures on the glass
Customer purchases
OG716549Paid
Customer Items ID & signatures Payment
Items (3) + Add metal + Add product
ItemWeightPricePrice/unit
18kt yellow gold24.20 g$1,604.46$66.30/g
Diamond, loose0.45 ct$460.00$1,022/ct
9kt gold pendant6.50 g$215.48$33.15/g
Total $2,279.94
Paid in full
$2,280.00
Of total
$2,280.00
Bank transfer21 Apr−$2,280.00
Why a till cannot do it

A purchase is a sale run backwards. Every part of it inverts.

You set the price instead of reading it off a tag. Stock arrives instead of leaving. Money goes out instead of coming in. And the record stops being a courtesy to the customer and becomes a duty to the state. Four inversions, and a point of sale gets all four wrong.

Inversion oneThe price is yours

Nothing to scan. The figure comes from today's metal price, the weight on the scale, and a margin you decided on once, per metal.

“$66.30 a gram, and here is why.”
Inversion twoThe stock arrives

Inventory goes up, not down. What arrives is either metal by weight or a product with a resale price ahead of it.

“349 grams this month.”
Inversion threeThe money leaves

A payout, not a takings line. It can leave on a schedule, in more than one method, or as credit that never leaves at all.

“Transfer, not the drawer.”
Inversion fourThe record is a duty

A sale needs a receipt. A purchase needs an identified seller, a birth date, a bank number and two signatures, on the day.

“Three of three done.”
And one thing that does not invert

The customer is standing in front of you. All four happen at the counter while they wait, and four checkpoints across the top say which one you are on.

CustomerItemsID & signaturesPayment
Inversion one · the price

A number you can say out loud.

The awkward part of buying is the pause: weighing the piece, doing arithmetic on a phone, then naming a figure you cannot explain if asked. Gem Logic does the arithmetic from the live rate and your own margin, and puts the price per gram on the line next to it, which is the number a jeweler actually argues about.

Items (3) Live spot · gold $104.00/g fine
18kt yellow gold · 24.20 g
$78.00/g market − 15% gold margin = $66.30/g
$1,604.46
Diamond, loose · 0.45 ct
Manual price after appraisal = $1,022/ct
$460.00
9kt gold pendant · 6.50 g
$39.00/g market − 15% gold margin = $33.15/g
$215.48
Add metal Add product
Customer offer
Rounded up from $2,279.94
$2,280
Gold margin: 15% under marketSave as quote
A margin per metal, decided once

Gold, silver, platinum and palladium each get their own percentage, set in settings on a quiet Tuesday. After that everyone at the counter buys on the same terms, including the person who started last week. Rates arrive on their own.

Add metal, or add product

Metal is priced from family, purity and weight. Anything else is a product: a loose stone you appraise by hand, a used watch you intend to resell. Both sit on the same record with a price per unit beside them.

Rounded for a human conversation

A calculator says $2,279.94. A jeweler says two thousand two hundred and eighty. The setting rounds up and never down, so the tidier number is never at the customer's expense.

Let them watch the number being built

A second screen faces the customer. They see the weight go on, the rate applied and the total move as you enter it. That is the difference between an offer and a figure that appeared from behind a counter, and it is the cheapest trust you will ever buy.

Customer display
Counter screenShow here
Window tabletShow here
The part nobody builds

Four checkpoints, and most purchases are sitting on one of them.

A purchase is not an event. Somebody wants a valuation but leaves the ring at home. Somebody signs but the transfer clears on Thursday. An estate lot is paid over three weeks. The checkpoints across the top of every purchase say which one it is waiting on, and the list says how many of each you have.

Customer purchases
April · all statuses · 6 of 31
Filter
PurchaseWaiting onTotal
Amélie Rousseau
OG716554 · 24 Apr
Quote$1,240.00
Thomas Bauer
OG716553 · 23 Apr
Items$3,780.00
Sofia Marchetti
OG716552 · 23 Apr
ID & signatures$890.00
Estate of R. Devlin
OG716551 · 22 Apr
Payment$12,450.00
Henry Okafor
OG716550 · 22 Apr
Balance
$6,200.00
$3,000.00 paid
Jacques Leroux
OG716549 · 21 Apr
Nothing$2,280.00
Five of these six need something from somebody. The list is the reminder.
Waiting on items

The valuation happened, the goods did not arrive. Every shop has three of these in a notebook and forgets two. Here the Items checkpoint is simply not ticked, and it shows up in a list you can look at on Monday.

Waiting on a balance

A six thousand dollar lot rarely leaves in one payment. A staggered plan holds the instalments with their dates, so what you owe and what you have paid are two different numbers the record keeps straight.

The checkpoint is the next action

An unticked ID box means photograph the ID. An unticked Payment box means pay. When someone rings to ask where their money is, whoever picks up can answer without having been there.

Inversion four · the record

Everything an inspection asks for, on one record.

Buying second hand from the public is the most regulated thing that happens at a jewelry counter, and in most shops it is the least retrievable: a photocopy in one folder, a register in a drawer, photographs on somebody's phone. None of that is hard to produce. It is hard to find. Here it is all attached to the purchase it belongs to, and a counter says three of three done.

ID card images

Photograph the seller's identity document on the tablet. It attaches to the purchase and to the contact, so the second visit is faster than the first.

The details the law wants

ID number, date of birth and bank number, held on the contact rather than asked for again. The fourth time Jacques comes in, the form is already filled.

Photograph every line

Each item on the purchase carries its own image, taken as it arrived. Three weeks later there is no argument about which chain was which.

Documents and the register

Police book entries and supplier transfers attach to the purchase, and Create document produces the paperwork that goes with it. Kept where it can be found.

Print label

One button for the packet the pieces go into, so the bag on the bench is still identifiable when you come back to it.

Everything this seller sold you

Every purchase from one person, on their contact record. Four visits in a month is a pattern, and it is better to see it than to remember it.

Identity & signatures 3 of 3 done
ID card images+ Add
Stored, redacted here
Signatures
Seller signed
Buyer signed
Signed at the counter, not printed and scanned

Both parties sign on the glass while the goods are still on the counter. Nobody prints a form in order to sign it and scans it back in to keep it, which is how signatures go missing.

And an ID photograph is personal data

The scan sits on the purchase behind a permission, not in a shared folder four people have open. Every purchase also records who bought it, so a valuation nobody wants to own is not a thing that can happen.

Permission to openBought by, on the record
Inversion two · the stock

What you bought is stock, at a cost you can prove.

Most software treats a buy-back as an errand that ends when the customer leaves with their money. The interesting part starts there. Those grams are the cheapest inventory in the shop, and what you make on them depends entirely on knowing what they cost.

Metal purchases, April
Gold · by purity · 31 purchases
Jeweler measures
PurityWeightPrice/unitPaid
18kt · 750214.60 g$66.30$14,227.98
14kt · 58588.00 g$51.71$4,550.83
9kt · 37546.40 g$33.15$1,538.16
Total349.00 gmixed$20,316.97
At today's market that metal is $23,902.32Spread $3,585.35
To the refiner, priced before you send it

The parcel is already grouped by family, purity and weight, so what you are sending is a figure you have rather than one you learn when the settlement arrives. When it does arrive, you can see what the month made.

Or back into the window

A piece worth more whole than melted came in as a product, and it keeps its purchase price as its cost. Bought at $2,400, sold at $3,950, and the $1,550 is a margin rather than a feeling.

Cost $2,400Sold $3,950+$1,550
The same table every month

Metal purchases are a report by family, purity and weight, filtered by date or by customer. Run it monthly and your cost per gram becomes a trend instead of an anecdote.

Inversion three · the money

A payout is not a refund, and it does not have to leave in one piece.

Bank transfer for anything of size, into the account already on the seller's contact. Cash only where cash is still permitted for metal bought from a private individual. Two methods on one purchase if that is what happened, on a schedule if the sum is large, and against a sale if the old ring is paying for the new one. The method belongs on the record, because in an inspection how you paid matters as much as what you paid.

Bank transferCashGift cardStaggered planAgainst a sale
PaymentPartially paidOG716550
Paid so far
$3,000.00
Of total
$6,200.00
Staggered payment planEdit plan
1
$3,000.00
due 22 Apr 2026
Paid
2
$3,200.00
due 6 May 2026
Due
Bank transfer22 Apr−$3,000.00
A plan, not a promise you made in a notebook

A large lot leaves on a schedule with dates on it, and each instalment carries its own paid state. What you still owe sellers is a real balance in your business, and this is the only place it is written down.

Or pay in credit and keep the money

Issue a gift card against the purchase and the payout never leaves the shop. Somebody who came in to sell a chain walks out with a balance to spend on the thing in the window. Offer a little more for it than you would in cash and both sides are better off.

Trade-in: two documents that know each other

If the old ring is paying for the new one, the purchase links to the sale it offsets and only the difference changes hands. Not one awkward discount nobody can explain in six months.

What did you pay per gram for 18kt last month?

If the answer is in a receipt book, or across three of them, book a demo. We will set your margins with you and run one purchase end to end on a tablet, at your own counter.

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