Round|Natural|GIA

1.50ct J SI1 Round Natural Diamond

EX • J/SI1 • GIA 6491906860

Certificate GIA 6491906860

Diamond specifications and retailer prices

From $5,970 SGD
$4,670 USD
As of October 25, 2026
Save $5,491 SGD (48%) vs most expensive(unlock to see where)
21 retailers carry this diamond
Most expensive: $12,994 SGD at NZ Jewellers · As of September 28, 2026
View at NZ Jewellers

About this 1.5ct natural round diamond

This 1.5ct natural round sits in the one-and-a-half to two carat band, graded J colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 6491906860. Listed at 21 retailers as of October 25, 2026, with a 92% 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

1.50
Carat
J
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Crown angle34°
Pavilion angle40.6°
OriginNatural
Grading LabGIA
CertificateGIA 6491906860
Dimensions7.37 × 7.35 × 4.51 mm
L/W Ratio1.00
Star length50%
Lower girdle75%
Top View
7.37 mm7.35 mm1.50 ctJ / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 6491906860
Side View
Table 56.0%Crown 34°Girdle: MED-STKPavilion 40.6°Culet: NoneDepth 61.3%

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 25
Current: $9,545 SGD|Low: $5,414 SGD|High: $11,584 SGD|Avg: $8,255 SGD|+2.1%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
October 31, 2026
Retailer 6$5,970 SGD
Retailer 7$6,497 SGD
Retailer 2$7,404 SGD
Retailer 8$7,720 SGD
Retailer 4$8,010 SGD
Retailer 3$9,307 SGD
Retailer 1$9,545 SGD
Retailer 5$11,461 SGD

40 data points across 8 retailers

21 retailers$5,970 SGD to $11,461 SGD

B+
Cheapest Retailer
-
$5,970 SGD
$4,670 USD
B+
Retailer 2
-
$6,138 SGD
$4,801 USD
View
B+
Retailer 3
-
$6,303 SGD
$4,930 USD
View
B
Retailer 4
-
$6,497 SGD
$5,082 USD
View
Final sale: no returns
B+
Retailer 5
-
$6,590 SGD
$5,155 USD
View
B
Retailer 6
-
$6,779 SGD
$5,303 USD
View
B
Retailer 7
-
$6,956 SGD
$5,441 USD
View
Retailer 8
-
$7,038 SGD
$5,505 USD
View
Price last confirmed 30 days ago
Retailer 9
-
$7,038 SGD
$5,505 USD
View
Price last confirmed 32 days ago
B+
Retailer 10
-
$7,404 SGD
£4,560 GBP
View
Retailer 11
-
$7,720 SGD
A$9,291 AUD
View
Price last confirmed 27 days ago
B
Retailer 12
-
$7,862 SGD
$6,150 USD
View
B
Retailer 13
-
$7,862 SGD
$6,150 USD
View
B
Retailer 14
-
$8,010 SGD
€5,967 EUR
View
Retailer 15
-
$8,120 SGD
$6,352 USD
View
Price last confirmed 32 days ago
B
Retailer 16
-
$8,131 SGD
$6,360 USD
View
Retailer 17
-
$8,567 SGD
$6,701 USD
View
Price last confirmed 8 days ago
B
Retailer 18
-
$9,307 SGD
£5,733 GBP
View
B
Retailer 19
-
$9,545 SGD
ZAR 120,620 ZAR
View
B
Retailer 20
-
$11,461 SGD
£7,059 GBP
View
Most Expensive
NZ Jewellers
83772850-e0ac-4468-a4d2-bf82afc77711 · Sep 28
$12,994 SGD
$10,164 USD
View
Price last confirmed 33 days ago
20 more retailers have this diamond
Prices start from $5,970 SGDSave up to $5,491 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+
1.50ct Round
$5,970 SGD