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Radiant|Natural|GIA

1.00ct D SI1 Radiant Natural Diamond

EX • D/SI1 • GIA 6505943659

Certificate GIA 6505943659

Diamond specifications and retailer prices

From $3,977 SGD
$3,111 USD
As of October 30, 2026
Save $4,139 SGD (51%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $8,117 SGD at NZ Jewellers · As of October 30, 2026
View at NZ Jewellers

About this 1ct natural radiant diamond

This 1ct natural radiant sits in the classic one-carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 6505943659. Listed at 15 retailers as of October 30, 2026, with prices from $3,977 to $8,117, a $4,139 spread on the same certified stone. NZ Jewellers lists it at $8,117. 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

1.00
Carat
D
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishVery Good
SymmetryVery Good
FluorescenceNone
Crown angle44.82°
Pavilion angle31.51°
OriginNatural
Grading LabGIA
CertificateGIA 6505943659
Dimensions6.61 × 5.10 × 3.30 mm
L/W Ratio1.30
Top View
6.61 mm5.10 mm1.00 ctD / SI1
OriginNatural
CutExcellent
PolishVery Good
SymmetryVery Good
FluorescenceNone
CertificateGIA 6505943659
Side View
Table 70.0%Crown 44.82°GirdlePavilion 31.51°Culet: NDepth 64.8%

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: Oct 30
Current: $4,435 SGD|Low: $3,977 SGD|High: $7,696 SGD|Avg: $5,239 SGD|-1.3%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 1, 2026
Retailer 8$3,977 SGD
Retailer 6$4,136 SGD
Retailer 1$4,435 SGD
Retailer 9$4,837 SGD
Retailer 2$4,869 SGD
Retailer 7$4,990 SGD
Retailer 4$5,454 SGD
Retailer 3$5,726 SGD
Retailer 5$7,645 SGD

41 data points across 9 retailers

15 retailers$3,977 SGD to $8,117 SGD

B+
Cheapest Retailer
-
$3,977 SGD
$3,111 USD
B+
Retailer 2
-
$4,136 SGD
$3,235 USD
View
B+
Retailer 3
-
$4,435 SGD
£2,732 GBP
View
B
Retailer 4
-
$4,474 SGD
$3,500 USD
View
B+
Retailer 5
-
$4,658 SGD
$3,644 USD
View
B+
Retailer 6
-
$4,658 SGD
$3,644 USD
View
B
Retailer 7
-
$4,837 SGD
$3,784 USD
View
B
Retailer 8
-
$4,844 SGD
$3,789 USD
View
B+
Retailer 9
-
$4,869 SGD
£2,999 GBP
View
Retailer 10
-
$4,990 SGD
A$6,005 AUD
View
Price last confirmed 23 days ago
B
Retailer 11
-
$5,376 SGD
$4,205 USD
View
B
Retailer 12
-
$5,454 SGD
€4,063 EUR
View
B
Retailer 13
-
$5,726 SGD
ZAR 72,360 ZAR
View
B
Retailer 14
-
$7,645 SGD
£4,709 GBP
View
Most Expensive
B
NZ Jewellers
8d68ffc7-03de-4063-a5a4-5e05efd635a3 · Oct 30
$8,117 SGD
$6,349 USD
View
14 more retailers have this diamond
Prices start from $3,977 SGDSave up to $4,139 SGD

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+
1.00ct Radiant
$3,977 SGD