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1.51ct H SI1 Round Natural Diamond

EX • H/SI1 • GIA 1533428742

Certificate GIA 1533428742

Diamond specifications and retailer prices

From $6,568 USD
As of November 2, 2026
Save $6,808 USD (51%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: $13,376 USD at NZ Jewellers · As of November 2, 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 H colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 1533428742. Listed at 19 retailers as of November 2, 2026, with prices from $6,568 to $13,376, a $6,808 spread on the same certified stone. NZ Jewellers lists it at $13,376. 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
FluorescenceFaint
Crown angle36°
Pavilion angle41.2°
OriginNatural
Grading LabGIA
CertificateGIA 1533428742
Dimensions7.34 × 7.27 × 4.59 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Crystal, Cloud, Needle, Indented Natural, Natural
Top View
7.34 mm7.27 mm1.51 ctH / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 1533428742
Side View
Table 57.0%Crown 36°Girdle: THN-STKPavilion 41.2°Culet: NoneDepth 62.9%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 2
Current: $13,376 USD|Low: $5,573 USD|High: $13,376 USD|Avg: $7,943 USD
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
Retailer 16
Retailer 17
Retailer 18
November 3, 2026
Retailer 9$6,083 USD
Retailer 8$6,240 USD
Retailer 5$6,568 USD
Retailer 14$6,688 USD
Retailer 7$6,712 USD
Retailer 3$6,712 USD
Retailer 15$6,925 USD
Retailer 18$7,458 USD
Retailer 11$7,565 USD
Retailer 16$7,725 USD
Retailer 6$8,080 USD
Retailer 13$8,080 USD
Retailer 4$8,145 USD
Retailer 2$8,325 USD
Retailer 17$8,350 USD
Retailer 10$10,427 USD
Retailer 12$11,146 USD
NZ Jewellers$13,376 USD

41 data points across 18 retailers

19 retailers$6,568 USD to $13,376 USD

Retailer 1
-
$5,486 USD
Price last confirmed 55 days ago
B+
Retailer 2
-
$6,568 USD
View
Retailer 3
-
$6,590 USD
View
Price last confirmed 46 days ago
B+
Retailer 4
-
$6,688 USD
View
Final sale: no returns
B+
Retailer 5
-
$6,712 USD
CA$9,323 CAD
View
B+
Retailer 6
-
$6,925 USD
View
B
Retailer 7
-
$7,458 USD
View
B+
Retailer 8
-
$7,565 USD
£5,957 GBP
View
Retailer 9
-
$7,604 USD
View
Price last confirmed 42 days ago
B+
Retailer 10
-
$7,725 USD
View
Retailer 11
-
$8,016 USD
View
Price last confirmed 44 days ago
B
Retailer 12
-
$8,080 USD
View
B
Retailer 13
-
$8,080 USD
View
B
Retailer 14
-
$8,145 USD
View
B+
Retailer 15
-
$8,325 USD
€7,929 EUR
View
B
Retailer 16
-
$8,350 USD
View
B
Retailer 17
-
$11,146 USD
£8,776 GBP
View
Retailer 18
-
$12,167 USD
View
Price last confirmed 43 days ago
Most Expensive
B
NZ Jewellers
e2dd3cb1-c754-4aa5-a1eb-a753c9f95080 · Nov 2
$13,376 USD
View
18 more retailers have this diamond
Prices start from $6,568 USDSave up to $6,808 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.

B+
1.51ct Round
$6,568 USD