Round|Natural|GIA

1.51ct E SI1 Round Natural Diamond

EX • E/SI1 • GIA 2427279307

Certificate GIA 2427279307

Diamond specifications and retailer prices

From $9,100 USD
As of October 25, 2026
Save $9,860 USD (52%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: $18,960 USD at Diamond Quarter · As of October 28, 2026
View at Diamond Quarter

About this 1.51ct natural round diamond

This 1.51ct natural round sits in the one-and-a-half to two carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 2427279307. Listed at 19 retailers as of October 25, 2026, with prices from $9,100 to $18,960, a $9,860 spread on the same certified stone. Diamond Quarter lists it at $18,960. 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
E
Color
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle32°
Pavilion angle41.4°
OriginNatural
Grading LabGIA
CertificateGIA 2427279307
Dimensions7.41 × 7.37 × 4.53 mm
L/W Ratio1.01
Star length50%
Lower girdle80%
Top View
7.41 mm7.37 mm1.51 ctE / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2427279307
Side View
Table 58.0%Crown 32°Girdle: Slightly ThickPavilion 41.4°Culet: NoneDepth 61.2%

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 25
Current: $12,316 USD|Low: $9,100 USD|High: $15,735 USD|Avg: $11,949 USD|-0.7%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
October 29, 2026
Retailer 6$9,100 USD
Retailer 8$9,237 USD
Retailer 9$9,850 USD
Retailer 3$10,762 USD
Retailer 5$10,961 USD
Retailer 4$11,916 USD
Retailer 1$12,316 USD
Retailer 7$14,451 USD
Retailer 2$15,631 USD

44 data points across 9 retailers

19 retailers$9,100 USD to $18,960 USD

B+
Cheapest Retailer
-
$9,100 USD
B+
Retailer 2
-
$9,237 USD
View
B+
Retailer 3
-
$9,850 USD
View
B+
Retailer 4
-
$9,956 USD
View
B+
Retailer 5
-
$10,762 USD
£8,474 GBP
View
B+
Retailer 6
-
$10,785 USD
View
B+
Retailer 7
-
$10,951 USD
View
B+
Retailer 8
-
$10,961 USD
A$16,864 AUD
View
B+
Retailer 9
-
$11,670 USD
View
B+
Retailer 10
-
$11,670 USD
View
B+
Retailer 11
-
$11,916 USD
€11,349 EUR
View
B+
Retailer 12
-
$12,316 USD
£9,697 GBP
View
B
Retailer 13
-
$12,445 USD
View
B
Retailer 14
-
$13,030 USD
View
B
Retailer 15
-
$13,099 USD
View
B
Retailer 16
-
$14,451 USD
ZAR 233,452 ZAR
View
Price last confirmed 11 days ago
B
Retailer 17
-
$15,631 USD
£12,308 GBP
View
B
Retailer 18
-
$16,593 USD
View
Most Expensive
B
Diamond Quarter
1.51SI1E2407034AN · Oct 28
$18,960 USD
£14,929 GBP
View
18 more retailers have this diamond
Prices start from $9,100 USDSave up to $9,860 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
$9,100 USD