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0.3 Carat Round Loose Diamond J Color VS1 Clarity Super Ideal Cut GIA Certified
0.3 Carat Round Loose Diamond J Color VS1 Clarity Super Ideal Cut GIA Certified
−57%
Jewelry · Brilliance.com

A loose diamond ready for the setting of your dreams

0.3 Carat Round Loose Diamond J Color VS1 Clarity Super Ideal Cut GIA Certified

A GIA-certified round brilliant with a super ideal cut, for anyone designing a ring that's truly their own.

Deal score 7.8 · Steal
$336.00$782.00 Brilliance.com's regular price

You save $446.00 at Brilliance.com

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Why it's a great deal

  • Brilliance.com lists its regular price at $782.00: 57% off by its own figures
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Every store we checked

  • Brilliance.comNew

    In stock

    $336.00Observed at 8:42 AM
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Price history and every store's price →

From Brilliance.com

  • 0.30 carat round natural diamond, 4.29 mm across
  • J color, near colorless with a warm tint, best in yellow or rose gold
  • VS1 clarity, minor inclusions invisible to the naked eye
  • Super Ideal cut, the store's top cut grade for maximum sparkle
  • 57 or 58 facets cut to return as much light as possible
  • Brilliant facets help hide small inclusions and hints of color
Materials
Natural diamond
Guarantee
Lifetime warranty
Returns
30-day returns, no questions asked; extended holiday returns until January 30, 2027
Shipping
Free shipping, fast and insured delivery, discreet packaging
In the box
Loose diamond, GIA certificate

What buyers say

Buyers like
  • Ring arrived on time and was perfect
  • Great ring for the price
  • Customer service was helpful
  • Best prices seen
  • Fast shipping
  • Easy, fully customizable ordering process
Buyers complain about
  • It took a little time, but worth the wait

About the 0.3 Carat Round Loose Diamond J Color VS1 Clarity Super Ideal Cut GIA Certified

A 0.30 carat round natural diamond, about 4.29 mm across, graded J color and VS1 clarity with a Super Ideal cut and a GIA certificate. The Super Ideal cut is the top cut grade here, so light return and sparkle are the priority, while the J color keeps the price down. At $336 at Brilliance.com as of November 5, 2026, it is the only new price listed, so there is no recent range to compare against.

Best forShoppers setting a diamond in yellow or rose goldBuyers who want maximum sparkle on a small budgetA first diamond purchase or a small stud or pendant stoneAnyone who wants GIA paperwork at a low price
Pros
  • Super Ideal cut, the top cut grade, for strong light return
  • VS1 clarity: inclusions are not visible to the naked eye
  • GIA certified, so the grades are independently verified
  • About 4.29 mm across, a practical size for studs or a small pendant
  • Warm J color pairs well with yellow or rose gold settings
Cons

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  • J color shows a warm tint, especially next to white metal or higher-color stones
  • 0.30 carat is small; it reads modest in a solitaire ring
  • Only one store lists it new, so there is no price competition
  • Loose stone only; a setting and setting fee are extra
  • Round cuts cost more per carat than fancy shapes at this size

What reviewers say

Buyers of this stone describe rings that arrived on time and looked right, and call it a good ring for the price. Service and shipping get consistent praise, with some noting a short wait before delivery.

Pros
  • Arrived on time and matched expectations
  • Good value for the price
  • Helpful customer service
  • Fast shipping and an easy ordering process
Cons
  • Delivery took a little time

Questions and answers

Is a J color VS1 diamond worth buying?
Yes if you set it in yellow or rose gold, where the warm tint blends in. In white metal the J tint is more visible, so step up in color if that bothers you.
Is Super Ideal cut better than Excellent?
Super Ideal is this store's top cut grade, above Excellent, and is cut for maximum light return. On a stone this small, cut quality matters more than the color or clarity jump you would get for the same money.
Will the inclusions be visible?
No. VS1 means minor inclusions that are not visible to the naked eye, and the brilliant facet pattern helps hide them further.
What comes with the diamond?
The loose diamond and its GIA certificate. A setting, ring sizing and setting fees are not included.
What size will it look in a ring?
It is about 4.29 mm across, roughly a third of a carat. That suits a solitaire, a three-stone ring or a pendant; expect a modest look in a wide band.
When is the best time to buy?
Loose diamond prices move with the market rather than store sales. At $336 at Brilliance.com as of November 5, 2026, it is the only new listing, so compare against similar GIA-certified stones before buying.