On 12 November 2026, a 5-carat lab-grown diamond tennis bracelet in 14K gold was listed at $4,150 at Brilliant Earth, and from $4,820 (or $2,892 on a 40% sale) to $6,210 at Blue Nile. Here's what explains the gap.
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What "5 carats" means
On a tennis bracelet, "5 ct. tw." is the total weight of every stone added together, not one 5-carat diamond. Brilliant Earth's 7-inch classic bracelet, for example, uses 55 round lab-grown diamonds to reach 5 ct total weight.[1] Stone count and size vary a lot between bracelets of the same total weight.[5]
Prices seen in November 2026
| Retailer and bracelet | Grades listed | Price | As of |
|---|---|---|---|
| Brilliant Earth, classic prong, 14K yellow gold, 7″, 55 stones | F/G, VS; IGI report | $4,150 | 12 Nov 2026, retailer page |
| Blue Nile, two-prong, 14K white gold, 7″, 63 stones | F–G / VS2–SI1 | $2,892 (40% off a $4,820 list price) | 12 Nov 2026, retailer page |
| Blue Nile, bezel, 14K white gold, 7″, 43 stones | F–G / VS2–SI1 | $5,450 | 12 Nov 2026, retailer page |
| Blue Nile, emerald-cut east-west bezel, 14K white gold, 7″, 37 stones | F–G / VS2–SI1 | $6,210 | 12 Nov 2026, retailer page |
| Clean Origin, Minimalist, 7″, 54 stones | H / VS–SI | $2,550 reported; see note | 1 Nov 2026, Everything Luxury |
| James Allen, 7″, 46 stones (standalone site later closed) | F–G / VS2–SI1 | $4,720 | 1 Nov 2026, Everything Luxury |
Brilliant Earth and Blue Nile prices were read on the retailers' own pages on 12 November 2026. The Blue Nile two-prong bracelet was marked 40% off that day, from a $4,820 list price to $2,892; sale prices change, so confirm on the retailer's page. The Clean Origin price of $2,550 is as reported by Everything Luxury on 1 November 2026; we could not re-open that product page on 12 November 2026 (the request was blocked). A Clean Origin collection listing that day showed $3,400 for the same 5 ct. tw. Minimalist bracelet, and the homepage was advertising 25% off sitewide — $2,550 is 25% off $3,400. The James Allen price is also from Everything Luxury, 1 November 2026. Signet closed James Allen's standalone website in 2026 and moved the brand to a collection at Blue Nile, so that exact listing may no longer be for sale there.[1][2][3][4][5][6] Prices change often.
Lab-grown vs natural at 5 carats
Everything Luxury compared one 46-stone James Allen design offered both ways on 1 November 2026: $4,720 with lab-grown diamonds against $7,760 with natural diamonds, 39% less for lab-grown.[5] That comparison is from before James Allen's standalone site closed. The same report notes that Jewelers Mutual warns resale value for lab-grown diamond jewelry is typically lower than for natural.[5] Buy lab-grown for the look and the price, not as an investment.
How it must be labelled
Under the FTC Jewelry Guides, "diamond" on its own means a mined diamond. A lab-grown stone has to be described with a qualifier such as "laboratory-grown" or "laboratory-created" right next to the word.[7][8] If a listing just says "diamond tennis bracelet" at a lab-grown price, ask.
What to check before you buy
- Total weight and stone count, and whether there's a grading report (Brilliant Earth lists an IGI report for the bracelet above).[1]
- Clasp: most 5 ct bracelets compared by Everything Luxury list a box clasp; ask whether there's a safety catch.[5]
- Resizing terms: Blue Nile lists a non-refundable $100 fee to shorten a bracelet.[2]
- Be wary of a large "original price" crossed out; compare the same carat weight, grades and length across retailers instead.[5]
Where to look
- Brilliant Earth, 5 ct lab tennis braceletRetailer link
- Blue Nile, 5 ct two-prong lab tennis braceletRetailer link
- Blue Nile, 5 ct bezel lab tennis braceletRetailer link
- Blue Nile, 5 ct emerald-cut east-west bezel lab tennis braceletRetailer link
- Clean Origin, 5 ct Minimalist tennis braceletRetailer link
- James Allen Collection at Blue NileRetailer link
On 12 November 2026, Brilliant Earth's product page advertised free shipping both ways and a free lifetime warranty; Blue Nile's product pages advertised free overnight shipping and extended returns.[1][2] Read the current policy on the retailer's site before you order.
Sources
- Brilliant Earth, 7 in. Certified Lab Diamond Classic Tennis Bracelet (5 ct. tw.). https://www.brilliantearth.com/7-in.-Certified-Lab-Diamond-Classic-Tennis-Bracelet-(5-ct.-tw.)-14K-Gold-BE5DTBS705LC/
- Blue Nile, 7 in. two-prong lab-grown diamond tennis bracelet (5 ct. tw.). https://www.bluenile.com/jewelry/bracelets/7-two-prong-lab-grown-diamond-tennis-bracelet-in-14k-white-gold-5-ct-tw-f-g-vs2-si1-item-252316
- Blue Nile, bezel tennis bracelet with 5 ctw round lab-grown diamonds. https://www.bluenile.com/jewelry/bracelets/bezel-tennis-bracelet-with-5-ctw-round-lab-grown-diamonds-in-14k-white-gold-item-297372
- Blue Nile, 7 in. emerald-cut east-west bezel lab-grown diamond tennis bracelet (5 ct. tw.). https://www.bluenile.com/jewelry/bracelets/7-emerald-cut-lab-grown-diamond-e-w-bezel-set-tennis-bracelet-in-14k-white-gold-5-ct-tw-f-g-vs2-si1-item-252451
- Everything Luxury, How Much Is a 5 Carat Tennis Bracelet? (prices seen 1 Nov 2026). https://everythingluxury.com/jewelry/how-much-is-a-5-carat-tennis-bracelet/
- Clean Origin, 5 ct. tw. Minimalist Tennis Bracelet. https://www.cleanorigin.com/5-ct-tw-minimalist-tennis-bracelet-br003574cf/
- eCFR, 16 CFR Part 23, FTC Guides for the Jewelry, Precious Metals, and Pewter Industries. https://www.ecfr.gov/current/title-16/chapter-I/subchapter-B/part-23
- National Jeweler, A Quick Review of the FTC's Rules on Lab-Grown Diamonds. https://nationaljeweler.com/articles/956-a-quick-review-of-the-ftc-s-rules-on-lab-grown-diamonds
- Blue Nile, James Allen Collection (James Allen standalone site closed in 2026). https://www.bluenile.com/james-allen
Sources opened on or before 12 November 2026.