Black FridayDealsBuying guidesBrandsStoresTermsPrivacydeal.ai apps

© Deal.ai Inc.

Deal.ai › Compare

3 ctw Radiant Lab Grown Diamond Solitaire Ring vs Pompeii3 3.40Ct Lab Grown Diamond Engagement Ring

Both are 3-carat-plus lab-grown diamond engagement rings in 14K gold, but they differ in shape and total weight. The Von Diamonds radiant solitaire is $999.00 as of November 5, 2026, and the Pompeii3 round halo-style ring is $1,169.99 at Walmart as of November 5, 2026. Choose the radiant solitaire for a clean, modern single-stone look at the lower price. Choose the round ring for a classic brilliant cut with accent diamonds and a slightly larger total weight.

Today the 3 ctw Radiant Lab Grown Diamond Solitaire Ring costs $170.99 less at its best price.

Ask our shopping agent

It checks today's price at every store, compares the alternatives and answers in about a minute.

Enter to send, Shift+Enter for a new line

3
3 ctw Radiant Lab Grown Diamond Solitaire Engagement Ring

3 ctw Radiant Lab Grown Diamond Solitaire Ring

3 ctw Radiant Lab Grown Diamond Solitaire Engagement Ring

5· 1 rating
$999.00at Von Diamonds
Observed at 11:44 AM
Visit store

Choose the Von Diamonds radiant solitaire if you want a bold single-stone look, a radiant cut, and the lower price of $999.00.

Pros
  • Lowest price of the two at $999.00
  • Radiant cut gives a distinct, modern look
  • Single stone keeps the design clean and easy to resize
  • Certified by Gemological Science International
  • Offered in 14K white, yellow, or rose gold, plus platinum
Cons
  • Smaller total weight at 3.00 ctw
  • Solitaire band has no accent sparkle
  • Listing color and clarity grades conflict (G/SI vs. colorless/VS2)
  • Standard size 7.0 only, so resizing may be needed
C
Certified 3.40Ct Round Cut Diamond Engagement Ring 14k Gold Lab Grown

Pompeii3 3.40Ct Lab Grown Diamond Engagement Ring

Certified 3.40Ct Round Cut Diamond Engagement Ring 14k Gold Lab Grown

5· 4 ratings
$1,169.99at WalmartObserved at 11:45 AM
Visit store

Choose the Pompeii3 round ring if you prefer a classic round brilliant center with pave accents and 3.40 ctw total.

Pros
  • Larger 3.40 ctw total weight
  • Round brilliant ideal cut maximizes sparkle
  • Pave accents add fire across the band
  • F-G color is a step above the radiant's G
  • Sold at 4 stores, giving more price options
Cons
  • Costs $170.99 more than the radiant
  • Clarity range includes SI1, so check the certificate
  • 27 stones mean more settings to inspect over time
  • Standard size 7.5; other sizes require a phone call

What separates them

3 ctw Radiant Lab Grown Diamond Solitaire RingPompeii3 3.40Ct Lab Grown Diamond Engagement Ring
Center stone shapeRadiant cutRound brilliant
Total diamond weight3.00 ctw3.40 ctw
Diamond countOne solitaire stone27 stones including accents
StyleSolitaire, plain bandPave accents along the band
Color gradeG (per listing); specs say colorlessF-G
Clarity gradeVS2 (specs); SI per listingVS2-SI1
Metal14K white, yellow, or rose gold; platinum option14K white, yellow, or rose gold
Price$999.00 at Von Diamonds as of November 5, 2026$1,169.99 at Walmart as of November 5, 2026

Price history

  • 3 ctw Radiant Lab Grown Diamond Solitaire Ring: lowest $5,099.00 on Nov 5 at David's House of Diamonds.
  • Pompeii3 3.40Ct Lab Grown Diamond Engagement Ring: lowest $1,169.99 on Nov 5 at Walmart.

Prices at every store

3 ctw Radiant Lab Grown Diamond Solitaire Ring

  • David's House of DiamondsNew

    In stock

    $5,099.00+ $4.99 shippingObserved at 11:45 AM
    Visit store
  • Von DiamondsNew

    Availability unknownReturn policy

    $999.00Observed at 11:44 AM
    Visit store
All 2 stores and price history →

Pompeii3 3.40Ct Lab Grown Diamond Engagement Ring

  • Bliss DiamondNew

    In stockReturn policy

    $1,299.99Verified
    Visit store
  • ShopSimonNew

    In stock

    $1,535.42Observed at 11:45 AM
    Visit store
  • WalmartNew

    Availability unknownSold by Pompeii3

    $1,169.99Observed at 11:45 AM
    Visit store
  • eBayNew

    Availability unknownSold by pompeii3

    $1,535.42Observed at 11:45 AM
    Visit store
All 4 stores and price history →

Specs compared

Spec3 ctw Radiant Lab Grown Diamond Solitaire RingPompeii3 3.40Ct Lab Grown Diamond Engagement Ring
MaterialGold, Rose Gold, White Gold, DiamondGold
ColorRose Gold, White Gold, Yellow GoldWhite
Gold Karatage14K14k
Diamond ColorColorlessF/G
Gemstone TypeLab-createdDiamond
Setting TypeSolitaireProng
Gemstone CutRadiantRound Cut, Ideal
CertificationIndependently certified by Gemological Science …Certified
DepartmentWomen's—
Diamond Weight3 carat—
Metal18K yellow gold—
Total diamond weight3 carats—
Show all 36 specsShow fewer specs
Spec3 ctw Radiant Lab Grown Diamond Solitaire RingPompeii3 3.40Ct Lab Grown Diamond Engagement Ring
Center stone weight3—
Diamond clarityVS2—
Center stone shapeRadiant-Cut—
Stone settingProng—
Standard ring size7.0—
Ring height9.5 mm—
Ring Size—7.5
Metal Type—White Gold
Metal Purity—14k
Metal Color

What reviewers say

Pompeii3 3.40Ct Lab Grown Diamond Engagement Ring

What people mention
  • SparklePraisedBuyers say the ring has brilliant sparkle and looks beautiful in person.
  • QualityPraisedOwners describe the build and stones as high quality.

Questions and answers

Which ring looks bigger on the hand?
The Pompeii3 ring has 3.40 ctw versus 3.00 ctw, and its pave band adds visible sparkle. The radiant's elongated shape can still face up large for its weight.
Which is better for a classic engagement look?
The Pompeii3 round brilliant with pave accents is the more traditional choice. The radiant solitaire reads as modern and minimal.
Is the Pompeii3 ring worth the extra $170.99?
It buys 0.40 ctw more diamond weight, a round ideal cut, and F-G color. If you want a plain solitaire and the lower price, the Von Diamonds ring is the better value.
Which has better diamond specs?
On paper the Pompeii3 ring grades F-G color with VS2-SI1 clarity. The Von Diamonds listing is inconsistent, showing G/SI in one place and colorless/VS2 in another, so confirm the certificate.
Can I get either ring in yellow or rose gold?
Yes. Both list 14K white, yellow, and rose gold options. The Von Diamonds ring also offers platinum.
Which is easier to resize?
The plain solitaire band on the Von Diamonds ring is simpler to resize. The Pompeii3 pave band has stones set along it, which makes resizing harder and costlier.

Buying guides that pick them

  • Best lab-grown diamond engagement rings under $1,500
—
White Gold, Rose Gold, Yellow Gold
Stone Material—Lab Grown
Gemstone Carat Weight—3 ct (center diamond)
Gemstone Clarity—VS2-SI1
Gemstone Shape—Round
Gemstone Count—27
Gemstone Treatment—Created
Jewelry Type—Ring
Style—Classic
Jewelry Subtype—Engagement Ring
Occasion—Engagement
Theme—Love
Embellishment—Pave
Accent Stone Cut—Round
Accent Stone Setting—Pave