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Lab Grown Diamond Necklaces

Lab Grown Diamond Necklaces Valentine Program: AQL, Tray Checks and What a QC Report - HOLYCOME

Holycome Trade Desk · November 9, 2026 · 9 min read

Lab Grown Diamond Necklaces: tolerances, cost structure and the reject rule for US wholesale buyers.

Lab Grown Diamond Necklaces Valentine Program: AQL, Tray Checks and What a QC Report - HOLYCOME

AQL, Tray Checks and What a QC Report Should Say

The brief was simple: 300 lab Grown Diamond Necklaces, 14K gold, delivered before November. The run that arrived carried 17 pieces with clasp fatigue, and the buyer spent USD 20-65 on sorting before the goods reached a shelf, on a 300-piece Valentine Program order at USD 29-201.

Nobody on that bench was careless. They were working to a spec that existed only in a photograph, and clasp fatigue is what a photograph fails to define, which is USD 29-201 on the Valentine Program schedule.

Lab Grown Diamond Necklaces wholesale piece from the HOLYCOME line in Wuzhou

The fix cost about 16 seconds per lab Grown Diamond Necklace and removed the credit note entirely. That is the whole economics of a spec sheet, and it is why we write one on every quote, on a 300-piece Valentine Program order at USD 29-201.

What US buyers Check Before They Sign

Four lines decide whether lab Grown Diamond Necklaces at USD 29-201 sells through or comes back, and none of them appears on a typical trading-company quote.

Spec pointCommon trade outputHOLYCOME standardCost if missed
Hallmark depth and placementStamped where it fitsFixed position, depth measured so it never breaks the shankCustoms query and remaking
Solder flow at the jointNot inspectedJoint inspected under 10x before settingCrack at the seam in transit
Plating thicknessNominal only0.20 micron rhodium logged per lot, 3 microns on vermeilWear-through inside one season
Surface porosity after polishSeen after platingCast porosity checked before plating, rejects pulled at that stagePlating blister six weeks later

Put these four into the purchase order and the Valentine Program argument after delivery becomes arithmetic, shipped as heart gift box and certified IGI report.

Where USD 29-201 Per Piece Actually Goes

Cost per piece at USD 29-201 leaves little room for assumption. The table shows which line compresses and which one only moves quality.

Lab Grown Diamond Necklaces setting and finish detail on a HOLYCOME factory sample
Cost lineShareWhat moves it
Base metal or alloy for lab Grown Diamond Necklaces30%Alloy choice and casting yield
Stone or melee for lab Grown Diamond Necklaces20%Sieve range and lot batching
Setting and finishing labor for lab Grown Diamond Necklaces19%Jig design and bench minutes
Plating, polish and QC for lab Grown Diamond Necklaces12%Per-tray versus per-piece checks
Packaging for lab Grown Diamond Necklaces19%heart gift box

A factory with no bench minutes per piece has never costed lab Grown Diamond Necklaces at USD 29-201. Ask for minutes and for the reject rule.

Order Terms, Sample Timing and Packing

The commercial frame is short enough to state in full. Minimum order is 50 pieces per design, and mixed designs travel in one shipment, so a 300-piece Valentine Program order can carry three or four models without a separate setup charge. Sample pieces leave in 3-5 days when the components are in stock, and a new model adds about twenty days before the first article exists, quoted at USD 29-201 per piece in heart gift box.

Payment is 30 percent with the order and 70 percent against the bill of lading, with the balance window stated on the invoice rather than agreed by message. Prices quoted at USD 29-201 are FOB Guangzhou or Shenzhen; DDP is quoted separately because the duty line moves with the tariff schedule and not with our cost.

Packing follows the heart gift box format at 300 pieces to the carton, and the packing list carries SKU, size and stone size so receiving can count without opening every box. Private-label cartons add three days for the print run and must be approved before the first bulk order, not after it, and 300 pieces leaves Wuzhou in heart gift box at USD 29-201.

Certification is IGI report for the lots that carry it, with a batch report and per-piece measurement of clasp pull strength for the lots below the threshold. The document set travels with the shipping papers, which is what a customs broker asks for at the port rather than after clearance, and the Valentine Program quote for it sits at USD 29-201.

A rejected tray is settled inside the same order cycle against the retained reference piece. If the difference sits on our retained sample we replace or credit; if it appeared in transit we split the assay cost and file with the carrier, and that rule is written on the order before the deposit clears, shipped as heart gift box and certified IGI report.

The Three Failures We See Most in Incoming Samples

clasp fatigue

A spring clasp rated by catalog rather than by pull test opens after 40-60 wear cycles. The rating belongs on the spec sheet, not on the website, shipped as heart gift box and certified IGI report.

In a 300-piece run this typically shows on 11 of pieces. Catching it means measuring clasp pull strength at the tray level, not inspecting the finished carton, shipped as heart gift box and certified IGI report.

link stretch

Chain stretch starts at the link join where the wire was drawn thin to save metal. Measuring wire diameter at both ends of a run catches it before shipping, priced at USD 29-201 for the 300-piece Valentine Program run.

The commercial effect is clasp replacement plus a goodwill credit, typically USD 7-12 per piece. Buyers who have seen it once put it in the purchase order; buyers who have not usually discover it on the first return, and at USD 29-201 for 300 pieces that is the number the buyer signs.

pendant bail shadow

A bail plated in a separate barrel than the chain shows a different white tone under store light. Plating a set in one barrel is the fix, and 300 pieces leaves Wuzhou in heart gift box at USD 29-201.

Our countermeasure is a gauge and a written limit. It adds about 16 seconds per piece and removes the defect from the run rather than from the carton, certified IGI report and packed heart gift box at 300 pieces.

AQL, Tray Checks and What a QC Report Should Say

Most lab Grown Diamond Necklaces disputes we arbitrate trace back to this line, not to the defect itself, on a 300-piece Valentine Program order at USD 29-201.

At 300 pieces the arithmetic on lab Grown Diamond Necklaces changes: the fixed costs spread, the variable costs do not. That is why the second order prices better than the first even when the gold fix has moved up, priced at USD 29-201 for the 300-piece Valentine Program run.

We quote both a first-run price and a reorder price for lab Grown Diamond Necklaces on the same sheet so the buyer can see where the curve flattens. Most flatten by the third run, shipped as heart gift box and certified IGI report.

Carton Cube, Duty and the Freight Line That Surprises Buyers

On lab Grown Diamond Necklaces, the cheapest answer is rarely the cheapest outcome once the second season is counted, priced at USD 29-201 for the 300-piece Valentine Program run.

One practical note on timing for lab Grown Diamond Necklaces: the calendar starts when the spec is signed, not when the deposit clears. A buyer who signs in week one and pays in week three gets the goods in week five, the figure being USD 29-201 for a 300-piece run.

We date the lab Grown Diamond Necklaces proforma from signature for that reason, and we state the deposit deadline in the same email that carries the spec sheet, with IGI report and heart gift box stated on the same sheet.

Valentine Window for lab Grown Diamond Necklaces

The Valentine window is short and unforgiving: stock has to be in the warehouse by the last week of January or the season is gone. That puts the production order in the second week of December, ahead of the Lunar New Year slowdown, on a 300-piece Valentine Program order at USD 29-201.

Paired designs move better than single pieces here. A matching pair of lab Grown Diamond Necklaces, boxed together with two cards, converts at the same retail price as two singles and costs about nine percent more to make, which the Valentine Program file records at USD 29-201 in heart gift box.

Photography has to be red-and-white neutral. A lab Grown Diamond Necklace shot on a red silk background reads as a gift in a listing thumbnail, and that is the only image most buyers will ever see, and the Valentine Program quote for it sits at USD 29-201.

How a Repeat Order Gets Built

The sequence below is fixed for a Valentine Program run. The dates move with the stone lot, not with the shipping season, which the Valentine Program file records at USD 29-201 in heart gift box.

  1. Lock the spec: metal, stone size range, plating thickness, sizing band and finish, all written on one sheet.
  2. Pull a stock-component sample in 3-5 days and measure it against that sheet, not against the photo.
  3. Approve the sample in writing, including the reject rule and the retained reference tray.
  4. Run bulk in 15-20 days for orders under 500 pieces, with the gauge check independent of the shift.
  5. Ship from Guangzhou or Shenzhen with the QC sheet in the carton and the batch report by email.

Reorders inside this sequence run 12-15 days, because the model and the gauge set stay here after the Valentine Program shipment, quoted at USD 29-201 per piece in heart gift box.

What This Means for a First Order

A first Valentine Program order of 50 pieces per design at USD 29-201 is a test of the line, not a commitment to the range.

Ask for the retained tray and the batch report with the first shipment. Both are free and both decide the second order, and at USD 29-201 for 300 pieces that is the number the buyer signs.

Freight, Duty and the Arrival Check

Export runs through Guangzhou or Shenzhen. Air freight lands in 5-8 days on the US west coast and 7-10 on the east, quoted at USD 29-201 per piece in heart gift box.

For a first order, DDP matters more than the freight rate. The surprise is the duty line, not the per-kilo charge, certified IGI report and packed heart gift box at 300 pieces, which is USD 29-201 on the Valentine Program schedule.

Check the count, the weight and clasp pull strength and chain length within +/-3 mm before the carton goes to the shelf. Twenty minutes at receiving saves a season of returns, the figure being USD 29-201 for a 300-piece run.

Frequently Asked Questions

What are the payment terms?

30 percent deposit with the order, 70 percent against the bill of lading. For accounts on a second order we quote 30/70 with a 15-day balance window once the first shipment has cleared, which is USD 29-201 on the Valentine Program schedule.

What is the minimum order for lab Grown Diamond Necklaces?

50 pieces per lab Grown Diamond Necklace. Designs mix inside one shipment, so a first order of three designs at 50 pieces each is normal for a new US account. Below 50 the gauge check stops being independent of the shift, the figure being USD 29-201 for a 300-piece run.

Do you supply certificates for lab Grown Diamond Necklaces?

IGI report on lab Grown Diamond Necklaces above the threshold stated on the quote. Below it we supply a batch report plus per-piece measurement of clasp pull strength, which is what a counter or a listing actually needs, on a 300-piece Valentine Program order at USD 29-201.

How do you handle a rejected tray?

We replace or credit inside the same order cycle. The retained reference tray decides: if clasp fatigue shows on our retained piece we own it, and if it appeared in transit we split the assay cost and file with the carrier, which is USD 29-201 on the Valentine Program schedule.

What are the payment terms?

30 percent deposit with the order, 70 percent against the bill of lading. For accounts on a second order we quote 30/70 with a 15-day balance window once the first shipment has cleared, which is USD 29-201 on the Valentine Program schedule.

Next Step

The next step is a sample in 3-5 days, not a container. Write to service@holycome.com or WhatsApp +86 18078079070 and mark it Valentine Program, quoted at USD 29-201 per piece in heart gift box.

HOLYCOME is operated by Wuzhou HengliLai Jewelry Co., Ltd., a factory in Wuzhou, Guangxi, producing since 2009 at roughly 60,000 pieces a month. Contact service@holycome.com or WhatsApp +86 18078079070, with IGI report and heart gift box stated on the same sheet.

Related reading: Lab Grown Diamond Earrings Made to Order: Carton Cube, Duty and the Freight Line That - HOLYCOME Lab Grown Diamond Earrings Trade Show Sample: MOQ, Mixed Designs and the Real First O - HOLYCOME

Topics: Lab Grown Diamond Necklaces Valentine Program

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Written by the Holycome manufacturing & quality team. Every figure and claim in this article comes from our own production floor in Wuzhou, China — in-house casting, stone setting and a three-pass quality inspection we have run since 2008.

Materials are tested for nickel, lead and cadmium release by SGS and CTT International; moissanite centre stones ship with their GRA warranty card and report. We also hold an independent SMETA / Sedex ethical-trade audit and a Hong Kong Customs AML registration.

Reviewed for accuracy by our quality team before publication. Last updated .

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