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Round|Natural|GIA

1.31ct I SI1 Round Natural Diamond

EX • I/SI1 • GIA 2136497726

Certificate GIA 2136497726

Diamond specifications and retailer prices

From $12,651 NZD
$7,130 USD
As of November 1, 2026
Save $5,083 NZD (29%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: $23,642 NZD at MOH London · As of November 1, 2026
View at MOH London

About this 1.31ct natural round diamond

This 1.31ct natural round sits in the one-and-a-quarter to one-and-a-half carat band, graded I colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 2136497726. Listed at 20 retailers as of October 31, 2026, with a 40% 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

1.31
Carat
I
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 2136497726
Dimensions7.05 × 7.05 × 4.28 mm
L/W Ratio1.00
Culet sizeVery Small
Top View
7.05 mm7.05 mm1.31 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2136497726
Side View
Table 59.0%CrownGirdle: Slightly ThickPavilionCulet: Very SmallDepth 60.7%

Caratlytics Score

How it works →
B
Good
Decent quality, room for better deals
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 1
Current: $23,642 NZD|Low: $11,822 NZD|High: $23,928 NZD|Avg: $16,725 NZD|-0.1%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 1, 2026
Retailer 6$12,651 NZD
Retailer 9$13,936 NZD
Retailer 7$14,187 NZD
Retailer 8$15,605 NZD
Retailer 5$15,668 NZD
Retailer 3$15,729 NZD
Retailer 10$16,861 NZD
Retailer 2$17,548 NZD
Retailer 4$20,842 NZD
MOH London$23,642 NZD

42 data points across 10 retailers

20 retailers$12,651 NZD to $17,734 NZD

B
Cheapest Retailer
-
$12,651 NZD
$7,130 USD
B
Retailer 2
-
$12,858 NZD
$7,247 USD
View
B
Retailer 3
-
$13,284 NZD
$7,487 USD
View
B
Retailer 4
-
$13,936 NZD
CA$10,909 CAD
View
B
Retailer 5
-
$14,123 NZD
$7,960 USD
View
B
Retailer 6
-
$14,187 NZD
$7,996 USD
View
Final sale: no returns
B
Retailer 7
-
$14,187 NZD
$7,996 USD
View
B
Retailer 8
-
$15,369 NZD
$8,662 USD
View
B
Retailer 9
-
$15,605 NZD
$8,795 USD
View
Retailer 10
-
$15,668 NZD
A$13,585 AUD
View
Price last confirmed 9 days ago
B
Retailer 11
-
$15,729 NZD
£6,980 GBP
View
B
Retailer 12
-
$16,820 NZD
$9,480 USD
View
B
Retailer 13
-
$16,820 NZD
$9,480 USD
View
B
Retailer 14
-
$16,861 NZD
$9,503 USD
View
B
Retailer 15
-
$17,388 NZD
$9,800 USD
View
B
Retailer 16
-
$17,548 NZD
€9,419 EUR
View
B
Retailer 17
-
$17,734 NZD
$9,995 USD
View
Retailer 18
-
$20,842 NZD
ZAR 189,763 ZAR
View
Price under review
Most Expensive
MOH London
18211AE1E · Nov 1
$23,642 NZD
£10,492 GBP
View
Price under review
18 more retailers have this diamond
Prices start from $12,651 NZDSave up to $5,083 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
1.31ct Round
$12,651 NZD