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1.51ct E SI1 Round Natural Diamond

EX • E/SI1 • GIA 1155978214

Certificate GIA 1155978214

Diamond specifications and retailer prices

From $19,683 NZD
$11,055 USD
As of October 25, 2026
Save $18,223 NZD (48%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: $37,906 NZD 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 1155978214. Listed at 18 retailers as of October 25, 2026, with prices from $19,683 to $37,906, a $18,223 spread on the same certified stone. Diamond Quarter lists it at $37,906. 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
FluorescenceStrong
OriginNatural
Grading LabGIA
CertificateGIA 1155978214
Dimensions7.38 × 7.36 × 4.47 mm
L/W Ratio1.00
Culet sizeNone
Top View
7.38 mm7.36 mm1.51 ctE / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceStrong
CertificateGIA 1155978214
Side View
Table 60.0%CrownGirdle: MED-STKPavilionCulet: NoneDepth 60.6%

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: $23,675 NZD|Low: $18,624 NZD|High: $35,323 NZD|Avg: $26,409 NZD|-0.9%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
October 30, 2026
Retailer 6$19,683 NZD
Retailer 7$21,418 NZD
Retailer 1$23,675 NZD
Retailer 5$23,988 NZD
Retailer 2$27,073 NZD
Retailer 4$32,658 NZD
Retailer 3$35,090 NZD

44 data points across 7 retailers

18 retailers$19,683 NZD to $37,906 NZD

B+
Cheapest Retailer
-
$19,683 NZD
$11,055 USD
B+
Retailer 2
-
$20,403 NZD
$11,459 USD
View
B+
Retailer 3
-
$20,736 NZD
$11,646 USD
View
B+
Retailer 4
-
$20,880 NZD
CA$16,288 CAD
View
B
Retailer 5
-
$21,418 NZD
$12,029 USD
View
Final sale: no returns
B
Retailer 6
-
$21,989 NZD
$12,350 USD
View
B
Retailer 7
-
$22,349 NZD
$12,552 USD
View
B
Retailer 8
-
$23,675 NZD
£10,470 GBP
View
B
Retailer 9
-
$23,837 NZD
$13,388 USD
View
B
Retailer 10
-
$23,988 NZD
A$20,727 AUD
View
B
Retailer 11
-
$24,209 NZD
$13,597 USD
View
B
Retailer 12
-
$25,141 NZD
$14,120 USD
View
B
Retailer 13
-
$25,894 NZD
$14,543 USD
View
B
Retailer 14
-
$27,073 NZD
€14,481 EUR
View
B
Retailer 15
-
$32,658 NZD
ZAR 296,315 ZAR
View
B
Retailer 16
-
$35,090 NZD
£15,518 GBP
View
B
Retailer 17
-
$37,246 NZD
$20,919 USD
View
Most Expensive
B
Diamond Quarter
1.51SI1E1114893CN · Oct 29
$37,906 NZD
£16,763 GBP
View
17 more retailers have this diamond
Prices start from $19,683 NZDSave up to $18,223 NZD

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
$19,683 NZD