CaratHunter
Plans
Marquise|Natural|GIA

1.51ct G SI1 Marquise Natural Diamond

ID • G/SI1 • GIA 6545876663

Certificate GIA 6545876663

Diamond specifications and retailer prices

From $13,550 SGD
$10,595 USD
As of November 1, 2026
Save $7,906 SGD (37%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: $21,455 SGD at Cape Diamonds · As of October 31, 2026
View at Cape Diamonds

About this 1.51ct natural marquise diamond

This 1.51ct natural marquise sits in the one-and-a-half to two carat band, graded G colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 6545876663. Listed at 11 retailers as of October 31, 2026, with prices from $13,550 to $21,455, a $7,906 spread on the same certified stone. Cape Diamonds lists it at $21,455. 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
G
Colour
SI1
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishExcellent
SymmetryVery Good
FluorescenceNone
Crown angle38.2°
Pavilion angle39.2°
OriginNatural
Grading LabGIA
CertificateGIA 6545876663
Dimensions11.47 × 6.07 × 3.73 mm
L/W Ratio1.89
Top View
11.47 mm6.07 mm1.51 ctG / SI1
OriginNatural
CutIdeal
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 6545876663
Side View
Table 60.0%Crown 38.2°Girdle: THK-VTKPavilion 39.2°Culet: NoneDepth 61.4%

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: $21,455 SGD|Low: $13,550 SGD|High: $21,455 SGD|Avg: $16,675 SGD|+3.1%
Cape Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 3, 2026
Retailer 10$13,550 SGD
Retailer 7$14,400 SGD
Retailer 2$15,796 SGD
Retailer 5$16,147 SGD
Retailer 8$16,156 SGD
Retailer 9$16,984 SGD
Retailer 11$16,984 SGD
Retailer 4$17,205 SGD
Retailer 6$17,421 SGD
Retailer 3$17,547 SGD
Cape Diamonds$21,455 SGD

43 data points across 11 retailers

11 retailers$13,550 SGD to $21,455 SGD

B+
Cheapest Retailer
-
$13,550 SGD
$10,595 USD
B
Retailer 2
-
$14,400 SGD
$11,260 USD
View
B+
Retailer 3
-
$15,796 SGD
£9,725 GBP
View
B
Retailer 4
-
$16,147 SGD
$12,626 USD
View
B
Retailer 5
-
$16,156 SGD
$12,633 USD
View
B
Retailer 6
-
$16,984 SGD
$13,280 USD
View
B
Retailer 7
-
$16,984 SGD
$13,280 USD
View
B
Retailer 8
-
$17,205 SGD
€12,812 EUR
View
Retailer 9
-
$17,421 SGD
$13,622 USD
View
Price last confirmed 7 days ago
B
Retailer 10
-
$17,547 SGD
$13,720 USD
View
Most Expensive
B
Cape Diamonds
cert_6545876663 · Oct 31
$21,455 SGD
ZAR 271,026 ZAR
View
10 more retailers have this diamond
Prices start from $13,550 SGDSave up to $7,906 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 Marquise
$13,550 SGD