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Round|Natural|GIA

1.51ct E SI1 Round Natural Diamond

EX • E/SI1 • GIA 2427279307

Certificate GIA 2427279307

Diamond specifications and retailer prices

From $12,953 AUD
$9,100 USD
As of October 25, 2026
Save $14,035 AUD (52%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: $26,988 AUD at Diamond Quarter · As of October 29, 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 $12,953 to $26,988, a $14,035 spread on the same certified stone. Diamond Quarter lists it at $26,988. 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
Colour
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: $15,365 AUD|Low: $12,953 AUD|High: $22,398 AUD|Avg: $17,014 AUD|-0.3%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
October 29, 2026
Retailer 6$12,953 AUD
Retailer 8$13,148 AUD
Retailer 9$14,020 AUD
Retailer 1$15,365 AUD
Retailer 5$15,602 AUD
Retailer 4$16,962 AUD
Retailer 2$17,530 AUD
Retailer 7$20,569 AUD
Retailer 3$22,249 AUD

44 data points across 9 retailers

19 retailers$12,953 AUD to $26,988 AUD

B+
Cheapest Retailer
-
$12,953 AUD
$9,100 USD
B+
Retailer 2
-
$13,148 AUD
$9,237 USD
View
B+
Retailer 3
-
$14,020 AUD
$9,850 USD
View
B+
Retailer 4
-
$14,171 AUD
$9,956 USD
View
B+
Retailer 5
-
$15,351 AUD
$10,785 USD
View
B+
Retailer 6
-
$15,365 AUD
£8,499 GBP
View
B+
Retailer 7
-
$15,588 AUD
$10,951 USD
View
B+
Retailer 8
-
$15,602 AUD
View
B+
Retailer 9
-
$16,611 AUD
$11,670 USD
View
B+
Retailer 10
-
$16,611 AUD
$11,670 USD
View
B+
Retailer 11
-
$16,962 AUD
€11,349 EUR
View
B+
Retailer 12
-
$17,530 AUD
£9,697 GBP
View
B
Retailer 13
-
$17,714 AUD
$12,445 USD
View
B
Retailer 14
-
$18,547 AUD
$13,030 USD
View
B
Retailer 15
-
$18,645 AUD
$13,099 USD
View
B
Retailer 16
-
$20,569 AUD
ZAR 233,452 ZAR
View
Price last confirmed 12 days ago
B
Retailer 17
-
$22,249 AUD
£12,308 GBP
View
B
Retailer 18
-
$23,618 AUD
$16,593 USD
View
Most Expensive
B
Diamond Quarter
1.51SI1E2407034AN · Oct 29
$26,988 AUD
£14,929 GBP
View
18 more retailers have this diamond
Prices start from $12,953 AUDSave up to $14,035 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 Round
$12,953 AUD