4.5 Carat Radiant Lab Grown Diamond Prices Comparison
As of February 2026, 4.5 carat radiant lab grown diamonds usually range from $884 to $18,155, with an average price of $2,886.In the last month, prices for these diamonds are down 2.3%.Compare 263 verified listings across 10 retailers tracked by CaratRadar.
4.5 Carat Radiant Lab Grown Diamond Market Overview
CaratRadar currently tracks 263 verified 4.5-carat radiant lab grown diamonds listed across 10 online retailers. Prices in this segment range from $884 to $18,155, with an average asking price of $2,886 and a median of $1,692.
The price spread of $17,271 (95.1% from highest to lowest) highlights why comparing identical certified diamonds across multiple retailers matters. Two identical certified diamonds can differ by hundreds or even thousands of dollars depending on the retailer.
These figures are based on our latest daily market data, matched by certification lab and certificate number across retailers, so you are comparing the exact same diamond.
263 diamonds tracked in this segment
Price range: $884 to $18,155
Average price: $2,886
Median price: $1,692
Available across 10 retailers
Savings potential: up to 95.1%
Price Range Overview
As of Feb 28, 2026Real market range for this carat, shape, and diamond type.
263
$884
$2,886
$1,692
$18,155
Price History
Price Comparison Matrix
Live Listings
See all listingsCompare current retailer offers for this exact segment and open any listing for full details.
GIASave 75.3%4.46ct | Radiant | D | IF | Excellent
From $13,034
Compare at $52,670
GIASave 68.7%4.46ct | Radiant | D | VVS1 | Excellent
From $6,409
Compare at $20,509
IGISave 50.2%4.46ct | Radiant | D | VVS1 | Ideal
From $6,371
Compare at $12,781
GIASave 69.5%4.47ct | Radiant | E | VVS2 | Excellent
From $3,355
Compare at $11,010
GIASave 77.8%4.47ct | Radiant | D | IF | Good
From $13,095
Compare at $59,080
IGISave 71.3%4.47ct | Radiant | E | VVS2 | Very Good
From $2,497
Compare at $8,690
IGISave 85.6%4.47ct | Radiant | F | VS1 | Very Good
From $1,273
Compare at $8,840
IGISave 86.2%4.47ct | Radiant | F | SI1 | Ideal
From $993
Compare at $7,200
IGISave 84%4.47ct | Radiant | F | VVS2 | Ideal
From $1,514
Compare at $9,490
GIASave 67.6%4.47ct | Radiant | D | VVS1 | Excellent
From $6,657
Compare at $20,555
IGISave 71.9%4.47ct | Radiant | D | IF | Ideal
From $10,487
Compare at $37,276
GIASave 64.7%4.48ct | Radiant | F | VS1 | Excellent
From $6,093
Compare at $17,280
GIASave 67.6%4.48ct | Radiant | D | VVS1 | Excellent
From $6,671
Compare at $20,601
IGISave 86.4%4.48ct | Radiant | G | VVS2 | Excellent
From $1,144
Compare at $8,420
IGISave 62.7%4.48ct | Radiant | FANCY | VS1 | Excellent
From $1,565
Compare at $4,197
IGISave 81.9%4.48ct | Radiant | D | VVS1 | Ideal
From $4,815
Compare at $26,660
GIASave 77.9%4.48ct | Radiant | D | IF | Excellent
From $13,107
Compare at $59,210
IGISave 66.2%4.48ct | Radiant | F | VS2 | Very Good
From $1,148
Compare at $3,400
GIASave 32.4%4.48ct | Radiant | D | IF | Excellent
From $15,726
Compare at $23,270
4.48ct | Radiant | E | VS1 | Ideal
From $1,276
Compare at $6,530
IGISave 64.3%4.48ct | Radiant | F | VS1 | Ideal
From $1,263
Compare at $3,535
IGISave 64.5%4.49ct | Radiant | D | IF | Ideal
From $8,287
Compare at $23,370
GIASave 75.2%4.49ct | Radiant | D | IF | Excellent
From $11,888
Compare at $47,920
IGISave 85.4%4.49ct | Radiant | E | VS1 | Excellent
From $1,366
Compare at $9,370
IGISave 83.9%4.49ct | Radiant | F | VVS2 | Very Good
From $1,749
Compare at $10,860
IGISave 80.5%4.49ct | Radiant | G | VS1 | Ideal
From $915
Compare at $4,690
IGI4.49ct | Radiant | D | VS1 | Ideal
From $9,474
Compare at $9,770
IGISave 39.8%4.49ct | Radiant | D | IF | Excellent
From $9,664
Compare at $16,056
IGISave 70.3%4.5ct | Radiant | F | SI1 | Ideal
From $2,156
Compare at $7,270
IGISave 87%4.5ct | Radiant | G | VS1 | Excellent
From $1,392
Compare at $10,722
GIASave 33.1%4.5ct | Radiant | E | VVS2 | Excellent
From $3,804
Compare at $5,682
GIASave 53.9%4.5ct | Radiant | E | VS1 | Ideal
From $3,834
Compare at $8,320
IGISave 83.1%4.5ct | Radiant | D | VS2 | Excellent
From $1,648
Compare at $9,740
IGISave 85.7%4.5ct | Radiant | D | VS1 | Excellent
From $1,511
Compare at $10,600
IGISave 57.5%4.5ct | Radiant | F | VVS2 | Very Good
From $1,758
Compare at $4,142
IGISave 85.5%4.5ct | Radiant | G | SI1 | Ideal
From $974
Compare at $6,700
IGISave 17.5%4.5ct | Radiant | F | VS1 | Very Good
From $1,034
Compare at $1,254
IGISave 77.7%4.5ct | Radiant | E | VS1 | Very Good
From $2,440
Compare at $10,940
IGISave 54%4.5ct | Radiant | F | VS2 | Very Good
From $1,281
Compare at $2,786
IGISave 82.9%4.5ct | Radiant | D | VS2 | Ideal
From $1,618
Compare at $9,480
4.5ct | Radiant | D | VS1 | Ideal
From $1,879
Compare at $11,170
IGISave 75.9%4.5ct | Radiant | F | VS1 | Very Good
From $1,497
Compare at $6,220
IGISave 72.8%4.5ct | Radiant | D | VVS1 | Excellent
From $3,950
Compare at $14,500
IGISave 81.9%4.5ct | Radiant | F | VVS1 | Ideal
From $2,033
Compare at $11,250
IGISave 83.9%4.5ct | Radiant | E | VVS2 | Ideal
From $1,752
Compare at $10,870
IGISave 82.9%4.5ct | Radiant | F | SI1 | Ideal
From $1,240
Compare at $7,260
IGISave 85.2%4.5ct | Radiant | G | VS1 | Ideal
From $1,258
Compare at $8,500
IGISave 85%4.5ct | Radiant | F | VS1 | Very Good
From $1,607
Compare at $10,690
IGISave 64.6%4.5ct | Radiant | F | VVS2 | Ideal
From $1,164
Compare at $3,293
GIASave 84%4.5ct | Radiant | E | VVS2 | Excellent
From $4,707
Compare at $29,400
Entry pricing in this category starts around $884.
What to Know When Shopping for 4.5 Carat Radiant Lab Grown Diamonds
- Always compare identical certified diamonds across retailers. Identical certificate numbers can have price differences of $17,271 or more.
- Focus on the 4Cs that matter most to you. Color and clarity grades drive price more than cut in many segments, but cut affects sparkle the most.
- The median price of $1,692 is a useful benchmark. If you see a deal significantly below this, verify the retailer's reputation and return policy.
- Consider eye-clean alternatives. Moving one clarity grade down (e.g., VS2 to SI1) can save 10-15% with no visible difference to the naked eye.
- Lab-grown diamonds offer excellent value. Ensure the stone comes with a GIA or IGI certificate confirming it is laboratory-grown.
- Check shipping, insurance, and return policies. The lowest sticker price is not always the best deal once you factor in total cost of purchase.
- Radiant cuts combine the elegance of emerald shapes with the brilliance of round cuts, offering good value per carat.
Frequently Asked Questions
We currently track 263 comparable stones in this segment. Prices start around $884 and go up to $18,155.
Based on the latest market data, the average asking price is about $2,886 with a median around $1,692.
The observed spread is roughly $17,271 across tracked listings, which is about 95.1% from highest to lowest offer in this bucket.
We refresh pricing data daily so these pages stay current with market changes.
Based on our data, the median price is $1,692, which represents the midpoint of the market. Anything below this figure from a reputable retailer is a solid deal.
We currently track this stone category across 10 online retailers, giving you a broad view of the competitive landscape.
For most buyers, color differences below G are hard to detect once set in a ring. Clarity grades of VS2 and above are typically eye-clean. Prioritize cut quality for maximum brilliance, then balance color and clarity based on your budget.
Retailer pricing strategies, overhead costs, and margin targets all contribute. The exact certified diamond can differ by $17,271 across sellers, which is why direct certified-diamond comparison is essential.
We match diamonds across retailers by their certification lab and certificate number. This means the prices you see are for the exact same physical diamond, not just stones with similar specs. It is a true apples-to-apples comparison.
Diamond prices fluctuate based on supply and demand. Our data refreshes regularly so you can track trends over time. Use the price range on this page as a benchmark and compare it to historical averages when available.
Diamond Terminology
- Carat
- A unit of weight for diamonds equal to 200 milligrams. Larger carat weights are exponentially rarer, which is why prices increase non-linearly with size.
- Cut
- Refers to how well a diamond's facets interact with light. Cut quality ranges from Ideal to Poor and is the single biggest factor affecting a diamond's brilliance.
- Color
- Grades a diamond's lack of color on a scale from D (colorless) to Z (light yellow). Grades D-F are considered colorless; G-J are near-colorless and offer good value.
- Clarity
- Measures the presence of internal inclusions or surface blemishes. Grades range from Flawless (FL) to Included (I3). Most inclusions in VS2 and above are invisible to the naked eye.
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