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1.51ct G SI1 Round Natural Diamond

EX • G/SI1 • GIA 2136190577

Certificate GIA 2136190577

Diamond specifications and retailer prices

From $16,702 SGD
$13,065 USD
As of November 1, 2026
Save $11,332 SGD (40%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: $33,540 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 G colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 2136190577. Listed at 20 retailers as of November 1, 2026, with a 68% 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
G
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 2136190577
Dimensions7.36 × 7.34 × 4.56 mm
L/W Ratio1.00
Culet sizeNone
Top View
7.36 mm7.34 mm1.51 ctG / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2136190577
Side View
Table 56.0%CrownGirdle: MED-STKPavilionCulet: NoneDepth 62.1%

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: $19,951 SGD|Low: $16,702 SGD|High: $30,159 SGD|Avg: $21,396 SGD|-0.8%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
Retailer 16
Retailer 17
Retailer 18
Retailer 19
November 2, 2026
Retailer 16$16,702 SGD
Retailer 11$17,454 SGD
Retailer 2$17,542 SGD
Retailer 4$17,869 SGD
Retailer 19$18,716 SGD
Retailer 7$19,081 SGD
Retailer 1$19,951 SGD
Retailer 15$20,044 SGD
Retailer 3$20,353 SGD
Retailer 9$20,672 SGD
Retailer 5$21,467 SGD
Retailer 6$21,528 SGD
Retailer 17$21,528 SGD
Retailer 8$22,160 SGD
Retailer 18$22,244 SGD
Retailer 13$23,005 SGD
Retailer 10$27,032 SGD
Retailer 14$28,034 SGD
Retailer 12$29,801 SGD

41 data points across 19 retailers

20 retailers$16,702 SGD to $28,034 SGD

B+
Cheapest Retailer
-
$16,702 SGD
$13,065 USD
B
Retailer 2
-
$17,454 SGD
$13,653 USD
View
B
Retailer 3
-
$17,542 SGD
$13,722 USD
View
B
Retailer 4
-
$17,869 SGD
CA$19,414 CAD
View
B
Retailer 5
-
$18,716 SGD
$14,640 USD
View
B
Retailer 6
-
$19,081 SGD
$14,926 USD
View
B
Retailer 7
-
$19,951 SGD
£12,288 GBP
View
Retailer 8
-
$20,044 SGD
A$24,121 AUD
View
Price last confirmed 9 days ago
B
Retailer 9
-
$20,353 SGD
$15,921 USD
View
B
Retailer 10
-
$20,672 SGD
$16,170 USD
View
B
Retailer 11
-
$21,467 SGD
$16,792 USD
View
B
Retailer 12
-
$21,528 SGD
$16,840 USD
View
B
Retailer 13
-
$21,528 SGD
$16,840 USD
View
B
Retailer 14
-
$22,160 SGD
$17,334 USD
View
B
Retailer 15
-
$22,244 SGD
$17,400 USD
View
B
Retailer 16
-
$23,005 SGD
€17,138 EUR
View
B
Retailer 17
-
$27,032 SGD
$21,145 USD
View
B
Retailer 18
-
$28,034 SGD
ZAR 354,262 ZAR
View
Retailer 19
-
$29,801 SGD
£18,355 GBP
View
Price under review
Most Expensive
Diamond Quarter
1.51SI1G217770E1N · Oct 29
$33,540 SGD
£20,658 GBP
View
Price under review
19 more retailers have this diamond
Prices start from $16,702 SGDSave up to $11,332 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
$16,702 SGD