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Oval|Natural|GIA

1.51ct D SI1 Oval Natural Diamond

EX • D/SI1 • GIA 2166672066

Certificate GIA 2166672066

Diamond specifications and retailer prices

From $16,115 AUD
$11,320 USD
As of October 28, 2026
Save $12,462 AUD (44%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: $28,577 AUD at MOH London · As of November 1, 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 $16,115 to $28,577, a $12,462 spread on the same certified stone. MOH London lists it at $28,577. 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
Colour
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: $28,577 AUD|Low: $16,115 AUD|High: $28,920 AUD|Avg: $21,991 AUD|-0.1%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 1, 2026
Retailer 6$16,115 AUD
Retailer 7$19,518 AUD
Retailer 2$19,532 AUD
Retailer 5$19,646 AUD
Retailer 10$19,822 AUD
Retailer 9$20,585 AUD
Retailer 4$22,018 AUD
Retailer 8$25,922 AUD
Retailer 3$26,882 AUD
MOH London$28,577 AUD

43 data points across 10 retailers

19 retailers$16,115 AUD to $28,577 AUD

B+
Cheapest Retailer
-
$16,115 AUD
$11,320 USD
B
Retailer 2
-
$16,976 AUD
$11,925 USD
View
B
Retailer 3
-
$17,002 AUD
$11,943 USD
View
B
Retailer 4
-
$17,102 AUD
CA$16,685 CAD
View
B
Retailer 5
-
$17,994 AUD
$12,640 USD
View
B
Retailer 6
-
$18,298 AUD
$12,853 USD
View
B
Retailer 7
-
$19,518 AUD
$13,710 USD
View
B
Retailer 8
-
$19,532 AUD
£10,803 GBP
View
Retailer 9
-
$19,646 AUD
View
Price last confirmed 9 days ago
B
Retailer 10
-
$19,822 AUD
$13,924 USD
View
B
Retailer 11
-
$20,585 AUD
$14,460 USD
View
B
Retailer 12
-
$20,984 AUD
$14,740 USD
View
B
Retailer 13
-
$20,984 AUD
$14,740 USD
View
B
Retailer 14
-
$21,207 AUD
$14,897 USD
View
B
Retailer 15
-
$21,681 AUD
$15,230 USD
View
B
Retailer 16
-
$22,018 AUD
€14,730 EUR
View
B
Retailer 17
-
$25,922 AUD
$18,209 USD
View
B
Retailer 18
-
$26,882 AUD
ZAR 305,059 ZAR
View
Most Expensive
B
MOH London
8A6CB078A · Nov 1
$28,577 AUD
£15,806 GBP
View
18 more retailers have this diamond
Prices start from $16,115 AUDSave up to $12,462 AUD

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
$16,115 AUD