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Marquise|Natural|GIA

1.51ct G SI1 Marquise Natural Diamond

EX • G/SI1 • GIA 6551543873

Certificate GIA 6551543873

Diamond specifications and retailer prices

From $12,114 SGD
$9,472 USD
As of November 1, 2026
Save $9,647 SGD (44%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: $21,760 SGD at NZ Jewellers · As of October 30, 2026
View at NZ Jewellers

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 6551543873. Listed at 17 retailers as of October 30, 2026, with prices from $12,114 to $21,760, a $9,647 spread on the same certified stone. NZ Jewellers lists it at $21,760. 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
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Crown angle36.97°
Pavilion angle41.43°
OriginNatural
Grading LabGIA
CertificateGIA 6551543873
Dimensions11.30 × 5.97 × 3.78 mm
L/W Ratio1.89
Culet sizeNone
Top View
11.30 mm5.97 mm1.51 ctG / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 6551543873
Side View
Table 60.0%Crown 36.97°Girdle: THN-THKPavilion 41.43°Culet: NoneDepth 63.3%

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: Nov 1
Current: $14,711 SGD|Low: $13,987 SGD|High: $20,637 SGD|Avg: $16,080 SGD|-1.2%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 2, 2026
Retailer 3$13,987 SGD
Retailer 9$14,145 SGD
Retailer 8$14,362 SGD
Retailer 7$14,519 SGD
Retailer 1$14,711 SGD
Retailer 6$14,971 SGD
Retailer 2$16,446 SGD
Retailer 5$19,181 SGD
Retailer 4$20,392 SGD

43 data points across 9 retailers

17 retailers$12,114 SGD to $21,760 SGD

B+
Cheapest Retailer
-
$12,114 SGD
$9,472 USD
B+
Retailer 2
-
$12,910 SGD
$10,095 USD
View
Retailer 3
-
$13,056 SGD
$10,209 USD
View
Price last confirmed 17 days ago
Retailer 4
-
$13,165 SGD
$10,294 USD
View
Price last confirmed 11 days ago
B+
Retailer 5
-
$13,927 SGD
$10,890 USD
View
B+
Retailer 6
-
$13,987 SGD
£8,611 GBP
View
B+
Retailer 7
-
$14,145 SGD
$11,060 USD
View
B
Retailer 8
-
$14,362 SGD
$11,230 USD
View
Retailer 9
-
$14,519 SGD
A$17,466 AUD
View
Price last confirmed 29 days ago
B+
Retailer 10
-
$14,711 SGD
£9,057 GBP
View
B+
Retailer 11
-
$14,971 SGD
$11,706 USD
View
B
Retailer 12
-
$16,320 SGD
$12,761 USD
View
B
Retailer 13
-
$16,446 SGD
€12,247 EUR
View
Retailer 14
-
$17,177 SGD
$13,431 USD
View
Price last confirmed 10 days ago
B
Retailer 15
-
$19,181 SGD
ZAR 242,301 ZAR
View
B
Retailer 16
-
$20,392 SGD
£12,555 GBP
View
Most Expensive
B
NZ Jewellers
04e58fd2-03b5-4f0a-8a02-4f720a580b04 · Oct 30
$21,760 SGD
$17,015 USD
View
16 more retailers have this diamond
Prices start from $12,114 SGDSave up to $9,647 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
$12,114 SGD