4.5 Carat Round Lab Grown Diamond Prices Comparison
As of February 2026, 4.5 carat round lab grown diamonds usually range from $669 to $42,320, with an average price of $2,048.In the last month, prices for these diamonds are down 4.9%.Compare 1,503 verified listings across 13 retailers tracked by CaratRadar.
4.5 Carat Round Lab Grown Diamond Market Overview
CaratRadar currently tracks 1,503 verified 4.5-carat round lab grown diamonds listed across 13 online retailers. Prices in this segment range from $669 to $42,320, with an average asking price of $2,048 and a median of $1,248.
The price spread of $41,651 (98.4% 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.
1,503 diamonds tracked in this segment
Price range: $669 to $42,320
Average price: $2,048
Median price: $1,248
Available across 13 retailers
Savings potential: up to 98.4%
Price Range Overview
As of Feb 28, 2026Real market range for this carat, shape, and diamond type.
1,503
$669
$2,048
$1,248
$42,320
Price History
Price Comparison Matrix
Live Listings
See all listingsCompare current retailer offers for this exact segment and open any listing for full details.
IGISave 72.1%4.46ct | Round | D | IF | Ideal
From $7,573
Compare at $27,170
IGISave 92.3%4.46ct | Round | E | VVS2 | Ideal
From $1,090
Compare at $14,140
IGISave 84%4.46ct | Round | E | VVS2 | Excellent
From $1,215
Compare at $7,590
IGISave 71.4%4.46ct | Round | E | VS1 | Excellent
From $1,057
Compare at $3,700
IGISave 72.4%4.46ct | Round | E | VS1 | Ideal
From $1,057
Compare at $3,835
IGISave 72.6%4.46ct | Round | D | VS1 | Ideal
From $1,246
Compare at $4,545
IGISave 65.6%4.46ct | Round | F | VS1 | Ideal
From $1,212
Compare at $3,520
IGISave 63.1%4.46ct | Round | F | VS2 | Excellent
From $1,200
Compare at $3,255
GCALSave 71.6%4.46ct | Round | E | VVS2 | Excellent
From $2,460
Compare at $8,670
GIASave 82.2%4.46ct | Round | D | VVS1 | Excellent
From $4,447
Compare at $24,960
IGISave 75.2%4.46ct | Round | G | SI1 | Excellent
From $1,183
Compare at $4,770
IGISave 69.8%4.46ct | Round | D | VVS1 | Ideal
From $3,877
Compare at $12,820
IGISave 84.7%4.46ct | Round | F | VS1 | Excellent
From $1,624
Compare at $10,590
IGISave 84.2%4.46ct | Round | F | VS1 | Excellent
From $1,130
Compare at $7,170
IGISave 72.4%4.46ct | Round | E | VS1 | Ideal
From $1,057
Compare at $3,835
IGISave 84.1%4.46ct | Round | E | VVS2 | Excellent
From $1,255
Compare at $7,890
IGISave 90.4%4.46ct | Round | E | VVS2 | Ideal
From $1,192
Compare at $12,380
GIASave 68.7%4.46ct | Round | D | VVS1 | Excellent
From $5,604
Compare at $17,930
IGISave 68.1%4.46ct | Round | E | VS1 | Ideal
From $1,223
Compare at $3,835
IGISave 66.1%4.46ct | Round | D | VS1 | Excellent
From $1,480
Compare at $4,370
IGISave 64.7%4.46ct | Round | E | VS2 | Excellent
From $1,225
Compare at $3,475
IGISave 90%4.46ct | Round | E | VS1 | Excellent
From $1,072
Compare at $10,740
IGISave 84%4.46ct | Round | E | VVS2 | Excellent
From $1,215
Compare at $7,590
IGISave 91.1%4.46ct | Round | E | VS1 | Ideal
From $1,103
Compare at $12,450
IGISave 64.2%4.46ct | Round | F | VS1 | Excellent
From $1,212
Compare at $3,385
IGISave 63.8%4.46ct | Round | F | VS1 | Ideal
From $3,542
Compare at $9,790
IGISave 62.2%4.46ct | Round | I | VS2 | Ideal
From $2,061
Compare at $5,450
IGISave 83%4.46ct | Round | G | VS2 | Ideal
From $749
Compare at $4,400
GIASave 68.7%4.46ct | Round | D | VVS1 | Excellent
From $5,604
Compare at $17,930
GIASave 71.5%4.46ct | Round | D | VVS2 | Excellent
From $3,616
Compare at $12,670
GIASave 70.6%4.46ct | Round | D | VS1 | Excellent
From $7,537
Compare at $25,630
GIASave 68.7%4.46ct | Round | D | VVS1 | Excellent
From $5,604
Compare at $17,930
GIASave 25.6%4.46ct | Round | G | VS2 | Excellent
From $5,575
Compare at $7,490
IGISave 83%4.46ct | Round | G | VS2 | Ideal
From $1,039
Compare at $6,110
IGISave 81.6%4.46ct | Round | H | VS1 | Ideal
From $669
Compare at $3,640
IGISave 84.9%4.46ct | Round | G | VS2 | Ideal
From $749
Compare at $4,970
GIASave 82.9%4.46ct | Round | D | VVS1 | Excellent
From $4,245
Compare at $24,807
IGISave 67%4.47ct | Round | E | VS1 | Excellent
From $1,225
Compare at $3,710
GIASave 81.8%4.47ct | Round | D | VVS2 | Excellent
From $2,901
Compare at $15,920
IGISave 83.8%4.47ct | Round | F | VS2 | Ideal
From $1,439
Compare at $8,870
IGISave 89.2%4.47ct | Round | F | SI1 | Ideal
From $670
Compare at $6,200
IGISave 82.6%4.47ct | Round | E | VVS2 | Ideal
From $1,304
Compare at $7,490
IGISave 78.4%4.47ct | Round | D | VS1 | Ideal
From $1,964
Compare at $9,080
IGISave 70.2%4.47ct | Round | D | IF | Excellent
From $8,139
Compare at $27,280
IGISave 85.2%4.47ct | Round | E | VVS2 | Ideal
From $1,164
Compare at $7,890
IGISave 74.1%4.47ct | Round | D | VS2 | Excellent
From $1,122
Compare at $4,335
IGISave 71.5%4.47ct | Round | E | VS1 | Excellent
From $1,059
Compare at $3,710
GIASave 76.3%4.47ct | Round | D | VVS1 | Excellent
From $5,888
Compare at $24,863
GIASave 80.8%4.47ct | Round | D | IF | Excellent
From $11,322
Compare at $59,120
IGISave 76.8%4.47ct | Round | G | VVS2 | Ideal
From $1,544
Compare at $6,660
Entry pricing in this category starts around $669.
What to Know When Shopping for 4.5 Carat Round Lab Grown Diamonds
- Always compare identical certified diamonds across retailers. Identical certificate numbers can have price differences of $41,651 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 $1,248 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.
- Round brilliants command a premium due to higher rough waste during cutting. If budget matters, consider oval or cushion shapes for similar visual size.
Frequently Asked Questions
We currently track 1,503 comparable stones in this segment. Prices start around $669 and go up to $42,320.
Based on the latest market data, the average asking price is about $2,048 with a median around $1,248.
The observed spread is roughly $41,651 across tracked listings, which is about 98.4% 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 $1,248, 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 13 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 $41,651 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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