Oval|Natural|GIA

1.51ct D SI1 Oval Natural Diamond

EX • D/SI1 • GIA 1169911515

Certificate GIA 1169911515

Diamond specifications and retailer prices

From $11,450 USD
As of October 28, 2026
Save $8,968 USD (44%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: $20,418 USD at MOH London · As of October 29, 2026
View at MOH London

About this 1.51ct natural oval diamond

This 1.51ct natural oval sits in the one-and-a-half to two carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 1169911515. Listed at 19 retailers as of October 28, 2026, with prices from $11,450 to $20,418, a $8,968 spread on the same certified stone. MOH London lists it at $20,418. 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
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 1169911515
Dimensions8.79 × 6.58 × 4.09 mm
L/W Ratio1.34
Top View
8.79 mm6.58 mm1.51 ctD / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 1169911515
Side View
Table 61.0%CrownGirdle: MED-THKPavilionCulet: NoneDepth 62.2%

Caratlytics Score

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

Price History

Last verified: Oct 28
Current: $20,418 USD|Low: $11,450 USD|High: $20,554 USD|Avg: $15,378 USD|+0.4%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
October 31, 2026
Retailer 7$11,450 USD
Retailer 3$13,004 USD
Retailer 8$13,871 USD
Retailer 4$13,882 USD
Retailer 6$13,964 USD
Retailer 10$14,088 USD
Retailer 9$14,630 USD
Retailer 2$15,650 USD
Retailer 11$18,422 USD
Retailer 5$19,003 USD
MOH London$20,418 USD

43 data points across 11 retailers

19 retailers$11,450 USD to $20,418 USD

B+
Cheapest Retailer
-
$11,450 USD
B
Retailer 2
-
$12,065 USD
View
B
Retailer 3
-
$12,085 USD
View
B
Retailer 4
-
$12,156 USD
CA$16,884 CAD
View
B
Retailer 5
-
$12,785 USD
View
B
Retailer 6
-
$13,004 USD
View
B
Retailer 7
-
$13,871 USD
View
B
Retailer 8
-
$13,882 USD
£10,931 GBP
View
Retailer 9
-
$13,964 USD
A$21,484 AUD
View
Price last confirmed 7 days ago
B
Retailer 10
-
$14,088 USD
View
B
Retailer 11
-
$14,630 USD
View
B
Retailer 12
-
$14,890 USD
View
B
Retailer 13
-
$14,890 USD
View
B
Retailer 14
-
$15,075 USD
View
B
Retailer 15
-
$15,390 USD
View
B
Retailer 16
-
$15,650 USD
€14,905 EUR
View
B
Retailer 17
-
$18,422 USD
View
B
Retailer 18
-
$19,003 USD
ZAR 306,998 ZAR
View
Most Expensive
B
MOH London
DE6A5FE04 · Oct 29
$20,418 USD
£16,077 GBP
View
18 more retailers have this diamond
Prices start from $11,450 USDSave up to $8,968 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 Oval
$11,450 USD