CaratHunter
Plans
Round|Natural|GIA

1.51ct D SI1 Round Natural Diamond

EX • D/SI1 • GIA 6422149049

Certificate GIA 6422149049

Diamond specifications and retailer prices

From $16,197 SGD
$12,670 USD
As of November 1, 2026
Save $12,632 SGD (44%) vs most expensive(unlock to see where)
22 retailers carry this diamond
Most expensive: $32,537 SGD at Diamond Quarter · As of October 29, 2026
View at Diamond Quarter

About this 1.51ct natural round diamond

This 1.51ct natural round sits in the one-and-a-half to two carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 6422149049. Listed at 22 retailers as of November 1, 2026, with a 78% 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

1.51
Carat
D
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle32°
Pavilion angle41.8°
OriginNatural
Grading LabGIA
CertificateGIA 6422149049
Dimensions7.51 × 7.45 × 4.51 mm
L/W Ratio1.01
Star length50%
Lower girdle80%
Top View
7.51 mm7.45 mm1.51 ctD / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6422149049
Side View
Table 59.0%Crown 32°Girdle: MED-STKPavilion 41.8°Culet: NoneDepth 60.4%

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: $28,830 SGD|Low: $15,383 SGD|High: $29,177 SGD|Avg: $21,304 SGD|-0.1%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 1, 2026
Retailer 6$16,197 SGD
Retailer 7$17,690 SGD
Retailer 3$19,295 SGD
Retailer 8$19,690 SGD
Retailer 5$19,833 SGD
Retailer 2$22,248 SGD
Retailer 4$27,120 SGD
Retailer 1$28,830 SGD

42 data points across 8 retailers

22 retailers$16,197 SGD to $28,830 SGD

B+
Cheapest Retailer
-
$16,197 SGD
$12,670 USD
B
Retailer 2
-
$16,880 SGD
$13,204 USD
View
B
Retailer 3
-
$16,971 SGD
$13,275 USD
View
B
Retailer 4
-
$17,280 SGD
CA$18,774 CAD
View
B
Retailer 5
-
$17,690 SGD
$13,838 USD
View
Final sale: no returns
B
Retailer 6
-
$18,115 SGD
$14,170 USD
View
B
Retailer 7
-
$18,460 SGD
$14,440 USD
View
B
Retailer 8
-
$19,295 SGD
£11,884 GBP
View
B
Retailer 9
-
$19,690 SGD
$15,402 USD
View
Retailer 10
-
$19,833 SGD
A$23,867 AUD
View
Price last confirmed 9 days ago
B
Retailer 11
-
$19,998 SGD
$15,643 USD
View
B
Retailer 12
-
$20,768 SGD
$16,245 USD
View
B
Retailer 13
-
$20,889 SGD
$16,340 USD
View
B
Retailer 14
-
$20,889 SGD
$16,340 USD
View
B
Retailer 15
-
$21,430 SGD
$16,763 USD
View
B
Retailer 16
-
$21,592 SGD
$16,890 USD
View
B
Retailer 17
-
$21,607 SGD
$16,902 USD
View
B
Retailer 18
-
$22,248 SGD
€16,574 EUR
View
B
Retailer 19
-
$26,151 SGD
$20,456 USD
View
B
Retailer 20
-
$27,120 SGD
ZAR 342,717 ZAR
View
B
Retailer 21
-
$28,830 SGD
£17,757 GBP
View
Most Expensive
Diamond Quarter
1.51SI1D644955AFN · Oct 29
$32,537 SGD
£20,040 GBP
View
Price under review
21 more retailers have this diamond
Prices start from $16,197 SGDSave up to $12,632 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+
1.51ct Round
$16,197 SGD