Round|Natural|GIA

1.18ct D SI1 Round Natural Diamond

EX • D/SI1 • GIA 1525556641

Certificate GIA 1525556641

Diamond specifications and retailer prices

From $5,669 USD
£4,464 GBP
As of October 31, 2026
Save $2,913 USD (34%) vs most expensive(unlock to see where)
3 retailers carry this diamond
Most expensive: $8,581 USD at MOH London · As of October 29, 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 October 29, 2026, with prices from $5,669 to $8,581, a $2,913 spread on the same certified stone. MOH London lists it at $8,581. 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
Color
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
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 31
Current: $8,581 USD|Low: $4,300 USD|High: $8,639 USD|Avg: $5,508 USD|-0.4%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
October 31, 2026
Retailer 6$4,300 USD
Retailer 4$4,493 USD
Retailer 5$4,748 USD
Retailer 7$4,969 USD
Retailer 9$5,114 USD
Retailer 8$5,392 USD
Retailer 2$5,669 USD
Retailer 3$6,110 USD
Retailer 10$6,620 USD
MOH London$8,581 USD

30 data points across 10 retailers

3 retailers$5,669 USD to $8,581 USD

B+
Cheapest Retailer
-
$5,669 USD
£4,464 GBP
B
Retailer 2
-
$6,110 USD
€5,819 EUR
View
Most Expensive
B
MOH London
4E8487882 · Oct 29
$8,581 USD
£6,757 GBP
View
2 more retailers have this diamond
Prices start from $5,669 USDSave up to $2,913 USD

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
$5,669 USD