Oval|Natural|GIA

1.51ct I SI1 Oval Natural Diamond

EX • I/SI1 • GIA 6552615943

Certificate GIA 6552615943

Diamond specifications and retailer prices

From $4,909 USD
As of October 26, 2026
Save $1,465 USD (23%) vs most expensive(unlock to see where)
31 retailers carry this diamond
Most expensive: $10,735 USD at NZ Jewellers · As of October 20, 2026
View at NZ Jewellers

About this 1.51ct natural oval diamond

This 1.51ct natural oval sits in the one-and-a-half to two carat band, graded I colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 6552615943. Listed at 31 retailers as of October 26, 2026, with a 30% 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
I
Color
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle40.12°
Pavilion angle38.97°
OriginNatural
Grading LabGIA
CertificateGIA 6552615943
Dimensions8.90 × 6.39 × 3.98 mm
L/W Ratio1.39
Culet sizeNone
Top View
8.90 mm6.39 mm1.51 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6552615943
Side View
Table 58.0%Crown 40.12°Girdle: MED-THKPavilion 38.97°Culet: NoneDepth 62.2%

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 26
Current: $10,735 USD|Low: $3,421 USD|High: $10,735 USD|Avg: $5,959 USD
NZ Jewellers
Retailer 2
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Retailer 35
Retailer 36
October 26, 2026
Retailer 30$3,421 USD
Retailer 27$4,454 USD
Retailer 25$4,465 USD
Retailer 26$4,814 USD
Retailer 34$4,820 USD
Retailer 24$4,909 USD
Retailer 35$5,014 USD
Retailer 17$5,071 USD
Retailer 2$5,074 USD
Retailer 6$5,137 USD
Retailer 20$5,366 USD
Retailer 14$5,430 USD
Retailer 18$5,627 USD
Retailer 21$5,714 USD
Retailer 12$5,739 USD
Retailer 3$5,815 USD
Retailer 8$5,815 USD
Retailer 15$5,815 USD
Retailer 10$5,919 USD
Retailer 7$6,073 USD
Retailer 22$6,086 USD
Retailer 31$6,102 USD
Retailer 13$6,150 USD
Retailer 23$6,374 USD
Retailer 11$6,490 USD
Retailer 32$6,490 USD
Retailer 19$6,575 USD
Retailer 36$6,580 USD
Retailer 33$6,700 USD
Retailer 16$6,709 USD
Retailer 28$7,437 USD
Retailer 29$7,767 USD
Retailer 5$7,791 USD
Retailer 9$9,302 USD
Retailer 4$9,507 USD
NZ Jewellers$10,735 USD

23 data points across 36 retailers

31 retailers$4,909 USD to $6,374 USD

Retailer 1
-
$4,820 USD
Price last confirmed 11 days ago
A
Retailer 2
-
$4,909 USD
View
Retailer 3
-
$5,014 USD
View
Price last confirmed 11 days ago
Retailer 4
-
$5,071 USD
View
Price last confirmed 12 days ago
A
Retailer 5
-
$5,074 USD
View
Retailer 6
-
$5,137 USD
View
Price last confirmed 11 days ago
Retailer 7
-
$5,201 USD
View
Price last confirmed 13 days ago
Retailer 8
-
$5,430 USD
View
Price last confirmed 11 days ago
B+
Retailer 9
-
$5,518 USD
View
B+
Retailer 10
-
$5,627 USD
CA$7,815 CAD
View
B+
Retailer 11
-
$5,714 USD
View
Retailer 12
-
$5,739 USD
View
Price last confirmed 14 days ago
Retailer 13
-
$5,815 USD
View
Price last confirmed 15 days ago
Retailer 14
-
$5,815 USD
View
Price last confirmed 12 days ago
Retailer 15
-
$5,815 USD
View
Price last confirmed 16 days ago
Retailer 16
-
$5,919 USD
View
Price last confirmed 11 days ago
Retailer 17
-
$6,073 USD
View
Price last confirmed 12 days ago
Retailer 18
-
$6,086 USD
View
Price last confirmed 11 days ago
Retailer 19
-
$6,102 USD
£4,805 GBP
View
Price last confirmed 11 days ago
Retailer 20
-
$6,150 USD
£4,842 GBP
View
Price last confirmed 10 days ago
B+
Retailer 21
-
$6,374 USD
View
Retailer 22
-
$6,490 USD
View
Price last confirmed 12 days ago
Retailer 23
-
$6,490 USD
View
Price last confirmed 13 days ago
Retailer 24
-
$6,575 USD
View
Price last confirmed 11 days ago
Retailer 25
-
$6,700 USD
View
Price last confirmed 11 days ago
Retailer 26
-
$6,709 USD
View
Price last confirmed 11 days ago
Retailer 27
-
$7,767 USD
View
Price last confirmed 37 days ago
Retailer 28
-
$7,791 USD
ZAR 125,871 ZAR
View
Price last confirmed 15 days ago
Retailer 29
-
$9,302 USD
View
Price last confirmed 12 days ago
Retailer 30
-
$9,507 USD
£7,486 GBP
View
Price last confirmed 11 days ago
Most Expensive
NZ Jewellers
4c5ebf8d-add2-4a1c-aa2d-7fa88683f094 · Oct 20
$10,735 USD
View
Price last confirmed 11 days ago
30 more retailers have this diamond
Prices start from $4,909 USDSave up to $1,465 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 Oval
$4,909 USD