Oval|Natural|GIA

1.51ct D SI1 Oval Natural Diamond

EX • D/SI1 • GIA 2166672066

Certificate GIA 2166672066

Diamond specifications and retailer prices

From $11,320 USD
As of October 28, 2026
Save $8,862 USD (44%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: $20,182 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 2166672066. Listed at 19 retailers as of October 28, 2026, with prices from $11,320 to $20,182, a $8,862 spread on the same certified stone. MOH London lists it at $20,182. 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
SymmetryGood
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 2166672066
Dimensions8.71 × 6.71 × 4.08 mm
L/W Ratio1.30
Top View
8.71 mm6.71 mm1.51 ctD / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryGood
FluorescenceNone
CertificateGIA 2166672066
Side View
Table 59.0%CrownGirdle: STK-VTKPavilionCulet: NoneDepth 60.9%

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: Oct 28
Current: $20,182 USD|Low: $11,320 USD|High: $20,315 USD|Avg: $15,178 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$11,320 USD
Retailer 3$12,853 USD
Retailer 8$13,710 USD
Retailer 4$13,719 USD
Retailer 6$13,800 USD
Retailer 11$13,924 USD
Retailer 10$14,460 USD
Retailer 2$15,467 USD
Retailer 9$18,209 USD
Retailer 5$18,783 USD
MOH London$20,182 USD

44 data points across 11 retailers

19 retailers$11,320 USD to $20,182 USD

B+
Cheapest Retailer
-
$11,320 USD
B
Retailer 2
-
$11,925 USD
View
B
Retailer 3
-
$11,943 USD
View
B
Retailer 4
-
$12,013 USD
CA$16,685 CAD
View
B
Retailer 5
-
$12,640 USD
View
B
Retailer 6
-
$12,853 USD
View
B
Retailer 7
-
$13,710 USD
View
B
Retailer 8
-
$13,719 USD
£10,803 GBP
View
Retailer 9
-
$13,800 USD
A$21,231 AUD
View
Price last confirmed 7 days ago
B
Retailer 10
-
$13,924 USD
View
B
Retailer 11
-
$14,460 USD
View
B
Retailer 12
-
$14,740 USD
View
B
Retailer 13
-
$14,740 USD
View
B
Retailer 14
-
$14,897 USD
View
B
Retailer 15
-
$15,230 USD
View
B
Retailer 16
-
$15,467 USD
€14,730 EUR
View
B
Retailer 17
-
$18,209 USD
View
B
Retailer 18
-
$18,783 USD
ZAR 303,437 ZAR
View
Most Expensive
B
MOH London
8A6CB078A · Oct 29
$20,182 USD
£15,891 GBP
View
18 more retailers have this diamond
Prices start from $11,320 USDSave up to $8,862 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
$11,320 USD