Round|Natural|GIA

1.51ct H SI1 Round Natural Diamond

EX • H/SI1 • GIA 6565157448

Certificate GIA 6565157448

Diamond specifications and retailer prices

From $4,934 USD
As of November 1, 2026
Save $3,470 USD (41%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: $9,060 USD at Wholesale Diamonds Direct · As of October 26, 2026
View at Wholesale Diamonds Direct

About this 1.51ct natural round diamond

This 1.51ct natural round sits in the one-and-a-half to two carat band, graded H colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 6565157448. Listed at 10 retailers as of November 1, 2026, with a 70% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

1.51
Carat
H
Color
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.5°
Pavilion angle41.8°
OriginNatural
Grading LabGIA
CertificateGIA 6565157448
Dimensions7.31 × 4.55 × 4.55 mm
L/W Ratio1.61
Culet sizeNone
Top View
7.31 mm4.55 mm1.51 ctH / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6565157448
Side View
Table 59.0%Crown 33.5°Girdle: MED-STKPavilion 41.8°Culet: NoneDepth 62.0%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 1
Current: $5,104 USD|Low: $4,934 USD|High: $10,027 USD|Avg: $6,404 USD|-9.0%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Wholesale Diamonds Direct
November 5, 2026
Retailer 6$4,934 USD
Retailer 1$5,104 USD
Retailer 4$5,277 USD
Retailer 5$5,438 USD
Retailer 2$5,542 USD
Retailer 7$5,880 USD
Retailer 9$6,199 USD
Retailer 3$6,413 USD
Retailer 8$8,404 USD
Wholesale Diamonds Direct$9,060 USD

36 data points across 10 retailers

10 retailers$4,934 USD to $8,404 USD

A
Cheapest Retailer
-
$4,934 USD
A
Retailer 2
-
$5,104 USD
View
A
Retailer 3
-
$5,277 USD
View
A
Retailer 4
-
$5,438 USD
View
A
Retailer 5
-
$5,542 USD
View
A
Retailer 6
-
$5,880 USD
View
B+
Retailer 7
-
$6,199 USD
View
B+
Retailer 8
-
$6,413 USD
View
B
Retailer 9
-
$8,404 USD
View
Most Expensive
Wholesale Diamonds Direct
299902968 · Oct 26
$9,060 USD
View
Price last confirmed 10 days ago
9 more retailers have this diamond
Prices start from $4,934 USDSave up to $3,470 USD

Carat Hunter is not affiliated with, endorsed by, or sponsored by any retailer listed. Retailer information is from publicly available sources and may not be current. Verify details directly with the retailer before purchasing. Return terms as we hold them. Check the retailer's own returns page before you buy.

A
1.51ct Round
$4,934 USD