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Round|Natural|GIA

1.18ct D SI1 Round Natural Diamond

EX • D/SI1 • GIA 1525556641

Certificate GIA 1525556641

Diamond specifications and retailer prices

From $10,058 NZD
£4,464 GBP
As of November 1, 2026
Save $5,087 NZD (34%) vs most expensive(unlock to see where)
3 retailers carry this diamond
Most expensive: $15,145 NZD at MOH London · As of November 1, 2026
View at MOH London

About this 1.18ct natural round diamond

This 1.18ct natural round sits in the classic one-carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 1525556641. Listed at 3 retailers as of November 1, 2026, with prices from $10,058 to $15,145, a $5,087 spread on the same certified stone. MOH London lists it at $15,145. 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

1.18
Carat
D
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 1525556641
Dimensions6.78 × 6.81 × 4.18 mm
L/W Ratio1.00
Top View
6.78 mm6.81 mm1.18 ctD / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1525556641
Side View
Table 58.0%CrownGirdle: MediumPavilionCulet: NoneDepth 61.6%

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: Nov 1
Current: $15,145 NZD|Low: $7,629 NZD|High: $15,327 NZD|Avg: $9,793 NZD|-0.9%
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$7,629 NZD
Retailer 4$7,972 NZD
Retailer 5$8,425 NZD
Retailer 7$8,817 NZD
Retailer 9$9,074 NZD
Retailer 8$9,567 NZD
Retailer 3$10,058 NZD
Retailer 2$10,766 NZD
Retailer 10$11,746 NZD
MOH London$15,145 NZD

30 data points across 10 retailers

3 retailers$10,058 NZD to $15,145 NZD

B+
Cheapest Retailer
-
$10,058 NZD
£4,464 GBP
B
Retailer 2
-
$10,766 NZD
€5,779 EUR
View
Most Expensive
B
MOH London
4E8487882 · Nov 1
$15,145 NZD
£6,721 GBP
View
2 more retailers have this diamond
Prices start from $10,058 NZDSave up to $5,087 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+
1.18ct Round
$10,058 NZD