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1.18ct D SI1 Round Natural Diamond

EX • D/SI1 • GIA 1242003683

Certificate GIA 1242003683

Diamond specifications and retailer prices

From $6,589 NZD
A$5,713 AUD
As of November 1, 2026
Save $1,860 NZD (22%) vs most expensive(unlock to see where)
2 retailers carry this diamond
Most expensive: $8,449 NZD at Yorxs · As of November 1, 2026
View at Yorxs

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 1242003683. Listed at 2 retailers as of November 1, 2026, with prices from $6,589 to $8,449, a $1,860 spread on the same certified stone. Yorxs lists it at $8,449. 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
PolishVery Good
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 1242003683
Dimensions6.81 × 6.83 × 4.14 mm
L/W Ratio1.00
Top View
6.81 mm6.83 mm1.18 ctD / SI1
OriginNatural
CutExcellent
PolishVery Good
SymmetryExcellent
FluorescenceNone
CertificateGIA 1242003683
Side View
Table 61.0%CrownGirdlePavilionCuletDepth 60.7%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 1
Current: $8,449 NZD|Low: $8,438 NZD|High: $8,508 NZD|Avg: $8,463 NZD|-0.1%
November 1, 2026
Yorxs$8,449 NZD

6 data points across 1 retailer

2 retailers$6,589 NZD to $8,449 NZD

B+
Cheapest Retailer
-
$6,589 NZD
A$5,713 AUD
Most Expensive
B
Yorxs
ARH2392-1 · Nov 1
$8,449 NZD
€4,535 EUR
View
1 more retailer has this diamond
Prices start from $6,589 NZDSave up to $1,860 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
$6,589 NZD