Round|Natural|GIA

1.51ct D SI2 Round Natural Diamond

EX • D/SI2 • GIA 1555390060

Certificate GIA 1555390060

Diamond specifications and retailer prices

From $4,759 USD
As of October 30, 2026
Save $4,163 USD (47%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: $10,617 USD at NZ Jewellers · As of September 19, 2026
View at NZ Jewellers

About this 1.51ct natural round diamond

This 1.51ct natural round sits in the one-and-a-half to two carat band, graded D colour (colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by GIA 1555390060. Listed at 17 retailers as of October 29, 2026, with a 87% 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
D
Color
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Crown angle35.5°
Pavilion angle40.8°
OriginNatural
Grading LabGIA
CertificateGIA 1555390060
Dimensions7.27 × 7.31 × 4.57 mm
L/W Ratio1.01
Key to symbols
Twinning Wisp, Cloud, Crystal, Feather, Needle, Natural
Top View
7.27 mm7.31 mm1.51 ctD / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 1555390060
Side View
Table 57.0%Crown 35.5°Girdle: MED-STKPavilion 40.8°Culet: NoneDepth 62.7%

Caratlytics Score

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

Price History

Last verified: Oct 30
Current: $6,582 USD|Low: $4,759 USD|High: $9,464 USD|Avg: $6,353 USD|-1.4%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
October 30, 2026
Retailer 8$4,759 USD
Retailer 6$5,395 USD
Retailer 2$5,751 USD
Retailer 3$5,837 USD
Retailer 7$6,100 USD
Retailer 9$6,100 USD
Retailer 5$6,300 USD
Retailer 1$6,582 USD
Retailer 10$6,644 USD
Retailer 4$8,922 USD

40 data points across 10 retailers

17 retailers$4,759 USD to $8,922 USD

A
Cheapest Retailer
-
$4,759 USD
A
Retailer 2
-
$5,395 USD
View
Retailer 3
-
$5,531 USD
View
Price last confirmed 23 days ago
Retailer 4
-
$5,531 USD
View
Price last confirmed 19 days ago
Retailer 5
-
$5,751 USD
View
Price last confirmed 43 days ago
Retailer 6
-
$5,751 USD
View
Price last confirmed 31 days ago
A
Retailer 7
-
$5,837 USD
£4,596 GBP
View
A
Retailer 8
-
$6,100 USD
View
A
Retailer 9
-
$6,100 USD
View
A
Retailer 10
-
$6,300 USD
View
Retailer 11
-
$6,381 USD
View
Price last confirmed 21 days ago
A
Retailer 12
-
$6,582 USD
€6,269 EUR
View
Retailer 13
-
$6,635 USD
View
Price last confirmed 39 days ago
Retailer 14
-
$6,644 USD
View
Price last confirmed 7 days ago
B+
Retailer 15
-
$8,922 USD
£7,025 GBP
View
Retailer 16
-
$10,210 USD
View
Price last confirmed 24 days ago
Most Expensive
NZ Jewellers
6ad84f01-e27b-4002-bd3a-7a6eb7c9473f · Sep 19
$10,617 USD
View
Price last confirmed 41 days ago
16 more retailers have this diamond
Prices start from $4,759 USDSave up to $4,163 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
$4,759 USD