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1.51ct G SI1 Round Natural Diamond

EX • G/SI1 • GIA 5181599972

Certificate GIA 5181599972

Diamond specifications and retailer prices

From $18,386 NZD
$10,345 USD
As of November 1, 2026
Save $19,382 NZD (51%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: $37,768 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 5181599972. Listed at 20 retailers as of November 1, 2026, with prices from $18,386 to $37,768, a $19,382 spread on the same certified stone. Diamond Quarter lists it at $37,768. 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 5181599972
Dimensions7.40 × 7.37 × 4.50 mm
L/W Ratio1.00
Top View
7.40 mm7.37 mm1.51 ctG / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 5181599972
Side View
Table 59.0%CrownGirdle: THN-STKPavilionCulet: 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: Nov 1
Current: $22,309 NZD|Low: $17,307 NZD|High: $34,615 NZD|Avg: $23,689 NZD|-4.8%
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
Retailer 20
November 2, 2026
Retailer 16$18,386 NZD
Retailer 13$18,942 NZD
Retailer 10$19,269 NZD
Retailer 3$19,717 NZD
Retailer 11$20,466 NZD
Retailer 6$20,770 NZD
Retailer 19$20,770 NZD
Retailer 1$22,309 NZD
Retailer 8$22,499 NZD
Retailer 15$22,597 NZD
Retailer 2$22,845 NZD
Retailer 7$24,038 NZD
Retailer 5$24,082 NZD
Retailer 17$24,082 NZD
Retailer 20$24,882 NZD
Retailer 18$24,964 NZD
Retailer 4$25,961 NZD
Retailer 14$30,512 NZD
Retailer 12$32,436 NZD
Retailer 9$34,615 NZD

44 data points across 20 retailers

20 retailers$18,386 NZD to $37,768 NZD

B+
Cheapest Retailer
-
$18,386 NZD
$10,345 USD
B+
Retailer 2
-
$18,942 NZD
$10,658 USD
View
B
Retailer 3
-
$19,269 NZD
$10,842 USD
View
B
Retailer 4
-
$19,717 NZD
CA$15,408 CAD
View
B
Retailer 5
-
$20,466 NZD
$11,515 USD
View
B
Retailer 6
-
$20,770 NZD
$11,686 USD
View
B
Retailer 7
-
$20,770 NZD
$11,686 USD
View
Final sale: no returns
B
Retailer 8
-
$22,309 NZD
£9,883 GBP
View
B
Retailer 9
-
$22,499 NZD
$12,659 USD
View
Retailer 10
-
$22,597 NZD
A$19,560 AUD
View
Price last confirmed 9 days ago
B
Retailer 11
-
$22,845 NZD
$12,854 USD
View
B
Retailer 12
-
$24,038 NZD
$13,525 USD
View
B
Retailer 13
-
$24,082 NZD
$13,550 USD
View
B
Retailer 14
-
$24,082 NZD
$13,550 USD
View
B
Retailer 15
-
$24,882 NZD
$14,000 USD
View
B
Retailer 16
-
$25,961 NZD
$14,607 USD
View
B
Retailer 17
-
$30,512 NZD
ZAR 277,346 ZAR
View
B
Retailer 18
-
$32,436 NZD
£14,370 GBP
View
B
Retailer 19
-
$34,615 NZD
$19,476 USD
View
Most Expensive
B
Diamond Quarter
1.51SI1G517287D1N · Nov 2
$37,768 NZD
£16,732 GBP
View
19 more retailers have this diamond
Prices start from $18,386 NZDSave up to $19,382 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
$18,386 NZD