How many 1.5 mm lab-grown diamond melee stones are in one carat?

Approximately 65. A 1.5 mm round brilliant weighs about 0.015 ct, so a 1-carat bag holds roughly 65 stones; a parcel at the small end of the ±0.1 mm tolerance holds more, one at the large end fewer. Caratura sells 1.5 mm laboratory-grown diamond melee as single-size 1-carat bags, DE colour, VS–VVS clarity, Hearts & Arrows cut.

How much does 1.5 mm lab-grown diamond melee cost?

$179 per 1-carat bag at Caratura, about $2.75 per stone, with the price listed on the product page — no quote. Shipping is $20 flat worldwide and free over $100, so a single bag ships free, with duties on us in the US and Europe. The minimum order is one bag.

What does one bag of 1.5 mm melee make?

About four single halos around a 1 ct centre (16–17 stones each), or one full eternity band in US sizes 5–8 (27–31 stones) with spares left over, or about four half-eternity bands. A 7-inch tennis bracelet in 1.5 mm takes about 86 stones, two bags.

What is the tolerance on 1.5 mm calibrated melee?

Each bag is one size sorted to within ±0.1 mm of 1.5 mm, stated in writing under Caratura's calibration and matching guarantee, hand-inspected and photographed or filmed before dispatch. Tighter sorting is usually possible on request.

Does the 1.5 mm melee come with a grading report?

No. Like all melee in the trade it is sorted and graded as a parcel — DE colour, VS–VVS clarity to the supplier's standard — not stone by stone. Describe it on invoices and appraisals as laboratory-grown diamond melee, with the qualifier next to the word diamond.

Will 1.5 mm lab-grown melee sit unnoticed next to a mined centre stone?

Yes — that is what most of it is bought for. Laboratory-grown diamond is diamond, with the same brightness, fire and hardness; DE melee reads a touch whiter than a G–H mined centre and noticeably whiter than a J or warmer one, so judge it on the piece and disclose it as laboratory-grown on the paperwork.

1.5 mm Lab-Grown Diamond Melee — ~65 Stones per Carat, $179 per 1-ct Bag

Short answer: a 1-carat bag of 1.5 mm round laboratory-grown diamond melee holds approximately 65 stones and costs $179 — about $2.75 per stone, each weighing roughly 0.015 ct. Every bag is one size, sorted to within ±0.1 mm, DE colour, VS–VVS clarity, Hearts & Arrows cut, and you see a photo or video of your actual stones before they ship. At 1.5 mm one bag covers a full eternity band or about four halos with spares; the minimum order is one bag, and at $179 it ships free.

Buy the 1.5 mm 1-ct bag — $179

1.5 mm laboratory-grown diamond melee — the specification

1.5 mm round laboratory-grown diamond melee, 1-carat bag, as listed in October 2026
Size	1.5 mm round brilliant, one size per bag, sorted to within ±0.1 mm of 1.5 mm
Stones per bag	Approx. 65 (1 carat ÷ about 0.015 ct per stone)
Weight per stone	Approx. 0.015 ct
Price	$179 per 1-ct bag — approx. $2.75 per stone. The listed price is the price; no quote.
Colour / clarity	DE / VS–VVS, graded as a parcel to the supplier's standard; no grading report with melee
Cut	Hearts & Arrows round brilliant
Minimum	One bag; larger quantities at the same listed price
Shipping	$20 flat worldwide, free over $100 — so one 1.5 mm bag ships free. Usually ships within 3 business days by tracked express.
Duties	On us in the US and Europe: prepaid (DDP) to the US, the EU and the UK; refunded against the receipt in Switzerland and Norway; paid by the recipient elsewhere
Before dispatch	Hand-inspected; a photo or video of your actual stones
Guarantee	14 days — not as described or damaged in transit, replaced or refunded at our cost; ±0.1 mm sorting in writing

SKU LGD-RND-1.5-BAG. The same bag in every other size from 0.7 to 3.6 mm is on the round laboratory-grown diamond melee page; the full size-by-size table is on the size chart.

What one bag of 1.5 mm makes

1.5 mm is the most-ordered melee size for pavé bands, halo surrounds and micro-set work: large enough to read as a continuous line of light, small enough to seat cleanly in a standard pavé or shared-prong setting. Counts below use the formulas from our halo and eternity band and tennis bracelet pages; stone cost is the count × $2.75.

Pieces made from 1.5 mm laboratory-grown diamond melee — approximate counts and stone cost
Piece	Stones (approx.)	Stone cost (approx.)	Bags needed
Single halo around a 1 ct round (6.5 mm)	16–17	$44–47	1 bag makes about 4 halos
Single halo around a 2 ct round (8 mm)	19–20	$52–55	1 bag makes about 3 halos
Half-eternity band, US size 6	14	$39	1 bag makes about 4 bands
Full eternity band, US size 5	27	$74	1 bag, with spares
Full eternity band, US size 6	28	$77	1 bag, with spares
Full eternity band, US size 7	30	$83	1 bag, with spares
Full eternity band, US size 8	31	$85	1 bag, with spares
Tennis bracelet, 7 in (165 mm stone run)	86	$237	2 bags ($358), spares included

Halo counts come from stones ≈ π × (centre width + 1.5) ÷ 1.5; line pieces from stones ≈ run length ÷ (1.5 + 0.4 mm of metal between seats). Add 10–15% for spares, never fewer than two — at 65 to the bag, the spares are usually already in the bag. A bag ordered months later is sorted to the same ±0.1 mm and graded to the same DE VS–VVS parcel standard, so what is left after one job is matched stock for the next.

Nearby sizes, 1.3 to 1.7 mm

Our round melee comes in 0.1 mm steps, so you can order the size a setting actually measures rather than the nearest sieve size. One step changes the count per carat by roughly 10–20 stones and the per-stone price by 25–75 cents.

Round laboratory-grown diamond melee, 1.3–1.7 mm, by the 1-carat bag — prices as listed in October 2026
Size	Approx. ct per stone	Approx. stones per bag	Price per bag	Approx. per stone	Buy
1.3 mm	0.010 ct	≈100	$199	≈$1.99	Buy
1.4 mm	0.013 ct	≈80	$179	≈$2.24	Buy
1.5 mm	0.015 ct	≈65	$179	≈$2.75	Buy
1.6 mm	0.018 ct	≈55	$179	≈$3.25	Buy
1.7 mm	0.021 ct	≈45	$179	≈$3.98	Buy

Matching an existing piece? Measure one stone in the row with a gauge rather than guessing from the design — production pavé is often a size smaller than it looks. If you are between sizes, send a photo of the setting on WhatsApp and Leilei confirms the size before you order.

Where "approximately 65" comes from

A carat is 0.2 g, so a 1-carat bag holds 0.2 g of stones whatever their size. For a round brilliant, weight rises roughly with the cube of the diameter; the trade's standard diamond sieve relation puts a 1.5 mm stone at about 0.015 ct, and 1 ÷ 0.015 ≈ 65. A parcel that runs to the small end of the ±0.1 mm tolerance holds more stones — 1.4 mm stones run about 80 to the carat — and one that runs large holds fewer; deeper pavilions and thicker girdles also add weight at the same diameter. Treat 65 as a planning number and the millimetre size as the specification. Bags under 3 mm are made up to a full carat.

Ordering

Choose 1.5 mm on the round laboratory-grown diamond melee page and check out. One bag is a normal order; a $179 bag ships free.
Want tighter sorting than ±0.1 mm, a mixed parcel, or more than we show in stock? Message Leilei on WhatsApp with the size and quantity first.
We inspect the parcel by hand, send you a photo or video of the actual stones, and ship within 3 business days with tracking. Duties on us in the US and Europe; track your order once it leaves.

Every bag is covered by the calibration and matching guarantee: any stone outside ±0.1 mm, reported within 14 days, is replaced or refunded.

Questions jewelers ask

How many 1.5 mm lab-grown diamond melee stones are in one carat?: Approximately 65. A 1.5 mm round brilliant weighs about 0.015 ct, so a 1-carat bag holds roughly 65 stones; a parcel at the small end of the ±0.1 mm tolerance holds more, one at the large end fewer. Caratura sells 1.5 mm laboratory-grown diamond melee as single-size 1-carat bags, DE colour, VS–VVS clarity, Hearts & Arrows cut.
How much does 1.5 mm lab-grown diamond melee cost?: $179 per 1-carat bag at Caratura, about $2.75 per stone, with the price listed on the product page — no quote. Shipping is $20 flat worldwide and free over $100, so a single bag ships free, with duties on us in the US and Europe. The minimum order is one bag.
What does one bag of 1.5 mm melee make?: About four single halos around a 1 ct centre (16–17 stones each), or one full eternity band in US sizes 5–8 (27–31 stones) with spares left over, or about four half-eternity bands. A 7-inch tennis bracelet in 1.5 mm takes about 86 stones, two bags.
What is the tolerance on 1.5 mm calibrated melee?: Each bag is one size sorted to within ±0.1 mm of 1.5 mm, stated in writing under Caratura's calibration and matching guarantee, hand-inspected and photographed or filmed before dispatch. Tighter sorting is usually possible on request.
Does the 1.5 mm melee come with a grading report?: No. Like all melee in the trade it is sorted and graded as a parcel — DE colour, VS–VVS clarity to the supplier's standard — not stone by stone. Describe it on invoices and appraisals as laboratory-grown diamond melee, with the qualifier next to the word diamond.
Will 1.5 mm lab-grown melee sit unnoticed next to a mined centre stone?: Yes — that is what most of it is bought for. Laboratory-grown diamond is diamond, with the same brightness, fire and hardness; DE melee reads a touch whiter than a G–H mined centre and noticeably whiter than a J or warmer one, so judge it on the piece and disclose it as laboratory-grown on the paperwork.

By Leilei, founder of Caratura — I source, inspect and pack every order myself. Every price is published on the product pages — no price list, no quote. Message me on WhatsApp with your spec for a stock check.