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Cobalt Polished 4mm Band

SKU: BCX-RCO-SFJY-8.5
Sale price  $82.03 Regular price  $157.00

You save $74.97 47% off

  • Cobalt
  • 4.0 mm band

Only 1 left · Ships within 2–3 business days

Ring Size: 8.5
Product subtotal: $82.03
  • Free shipping over $99
  • 30-day returns & size exchanges
  • Secure checkout

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The details

Polished to a bright, mirror-like finish, this half-round cobalt band brings a clean, contemporary look to one of jewelry's most enduring forms. Cobalt's naturally white tone means the color belongs to the metal itself, and the gently domed profile gives the band a comfortable, rounded feel that sits easily against the finger through long days of wear.

The polished surface catches light evenly across the band, and cobalt's exceptional hardness means that surface resists the everyday scuffs that dull softer metals over time. Engravable and sized to a standard fit, it suits a wide range of occasions and wearers, from a first wedding band to a quietly confident everyday ring.

Key Features

  • Crafted in cobalt with a polished finish
  • Measures 4 mm wide
  • Approximate weight of 4.86 grams

Why You’ll Love It

  • A bright, mirror finish that holds its shine through daily wear.
  • Cobalt's natural white tone needs no coating to look its best.
  • The domed profile sits comfortably and feels right from the first day.
  • Engravable, so it can carry a date, a name, or a few words that matter.

Perfect For

This band suits anyone looking for a durable, low-maintenance ring that does not sacrifice style for practicality. It works equally well as a wedding band, an anniversary gift, or an everyday ring for a man or woman who appreciates clean, modern design. A thoughtful gift for nearly any milestone worth marking.

Size & fit
  • Available in ring sizes 8.5 to 10.5.
  • Band width: 4.0 mm.
  • Between sizes? Wider bands fit snugger, so go up a half size for bands over 6 mm.
  • Not sure of the size? Our ring size guide walks you through measuring at home.
  • The wrong size? Exchange it for another size within 30 days of delivery.
Shipping & returns
  • Free standard shipping on U.S. orders of $99 and above; under $99 the rate is shown at checkout.
  • Orders ship within 2 to 3 business days in insured packaging, with tracking sent by email.
  • Faster delivery: USPS Priority Mail and UPS options at checkout, where rates and delivery estimates are shown before you pay.
  • Not the right piece, or the wrong size? Return it, or exchange it for another size, within 30 days of delivery. Items must be unworn and in their original condition and packaging.
  • Covered by our One-Year Limited Jewelry Warranty against manufacturing defects.

Shipping & delivery · Returns & exchanges

Jewelry care
  • Put jewelry on last, after lotion and perfume, and take it off before showering, swimming or sleeping.
  • Store each piece on its own in a soft pouch so it doesn't scratch.

The full jewelry care guide

Cobalt Polished 4mm Band
Regular price $82.03 USD
Regular price $157.00 USD Sale price $82.03 USD
Ring Size: 8.5
Cobalt Polished 4mm Band - Birthstone Company
Cobalt Polished 4mm Band
Sale price  $82.03 Regular price  $157.00
Specifications

The details

Metal
Cobalt, polished
Band width
4.0 mm
Sizes
8.5, 9, 9.5, 10.5
Weight
4.86 g
Show all specifications
Made in
China
Item number
BCX-RCO-SFJY-8.5

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