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Round|Natural|GIA

1.51ct G SI1 Round Natural Diamond

EX • G/SI1 • GIA 2136190577

Certificate GIA 2136190577

Diamond specifications and retailer prices

From $23,220 NZD
$13,065 USD
As of November 1, 2026
Save $15,754 NZD (40%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: $46,630 NZD at Diamond Quarter · As of November 2, 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 G colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 2136190577. Listed at 20 retailers as of November 1, 2026, with a 68% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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
G
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 2136190577
Dimensions7.36 × 7.34 × 4.56 mm
L/W Ratio1.00
Culet sizeNone
Top View
7.36 mm7.34 mm1.51 ctG / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2136190577
Side View
Table 56.0%CrownGirdle: MED-STKPavilionCulet: NoneDepth 62.1%

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: Nov 1
Current: $27,736 NZD|Low: $23,220 NZD|High: $41,929 NZD|Avg: $29,746 NZD|-0.8%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
Retailer 16
Retailer 17
Retailer 18
Retailer 19
November 2, 2026
Retailer 16$23,220 NZD
Retailer 11$24,265 NZD
Retailer 2$24,388 NZD
Retailer 4$24,843 NZD
Retailer 19$26,020 NZD
Retailer 7$26,528 NZD
Retailer 1$27,736 NZD
Retailer 15$27,866 NZD
Retailer 3$28,296 NZD
Retailer 9$28,739 NZD
Retailer 5$29,844 NZD
Retailer 6$29,930 NZD
Retailer 17$29,930 NZD
Retailer 8$30,808 NZD
Retailer 18$30,925 NZD
Retailer 13$31,982 NZD
Retailer 10$37,581 NZD
Retailer 14$38,974 NZD
Retailer 12$41,430 NZD

41 data points across 19 retailers

20 retailers$23,220 NZD to $38,974 NZD

B+
Cheapest Retailer
-
$23,220 NZD
$13,065 USD
B
Retailer 2
-
$24,265 NZD
$13,653 USD
View
B
Retailer 3
-
$24,388 NZD
$13,722 USD
View
B
Retailer 4
-
$24,843 NZD
CA$19,414 CAD
View
B
Retailer 5
-
$26,020 NZD
$14,640 USD
View
B
Retailer 6
-
$26,528 NZD
$14,926 USD
View
B
Retailer 7
-
$27,736 NZD
£12,288 GBP
View
Retailer 8
-
$27,866 NZD
A$24,121 AUD
View
Price last confirmed 9 days ago
B
Retailer 9
-
$28,296 NZD
$15,921 USD
View
B
Retailer 10
-
$28,739 NZD
$16,170 USD
View
B
Retailer 11
-
$29,844 NZD
$16,792 USD
View
B
Retailer 12
-
$29,930 NZD
$16,840 USD
View
B
Retailer 13
-
$29,930 NZD
$16,840 USD
View
B
Retailer 14
-
$30,808 NZD
$17,334 USD
View
B
Retailer 15
-
$30,925 NZD
$17,400 USD
View
B
Retailer 16
-
$31,982 NZD
€17,138 EUR
View
B
Retailer 17
-
$37,581 NZD
$21,145 USD
View
B
Retailer 18
-
$38,974 NZD
ZAR 354,262 ZAR
View
Retailer 19
-
$41,430 NZD
£18,355 GBP
View
Price under review
Most Expensive
Diamond Quarter
1.51SI1G217770E1N · Nov 2
$46,630 NZD
£20,658 GBP
View
Price under review
19 more retailers have this diamond
Prices start from $23,220 NZDSave up to $15,754 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
$23,220 NZD