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Round|Natural|GIA

1.51ct E SI1 Round Natural Diamond

EX • E/SI1 • GIA 1155978214

Certificate GIA 1155978214

Diamond specifications and retailer prices

From $14,169 SGD
$11,055 USD
As of October 25, 2026
Save $13,118 SGD (48%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: $27,287 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 E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 1155978214. Listed at 18 retailers as of October 25, 2026, with prices from $14,169 to $27,287, a $13,118 spread on the same certified stone. Diamond Quarter lists it at $27,287. 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
E
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceStrong
OriginNatural
Grading LabGIA
CertificateGIA 1155978214
Dimensions7.38 × 7.36 × 4.47 mm
L/W Ratio1.00
Culet sizeNone
Top View
7.38 mm7.36 mm1.51 ctE / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceStrong
CertificateGIA 1155978214
Side View
Table 60.0%CrownGirdle: MED-STKPavilionCulet: NoneDepth 60.6%

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: $17,043 SGD|Low: $13,407 SGD|High: $25,427 SGD|Avg: $19,005 SGD|-0.9%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
October 29, 2026
Retailer 6$14,169 SGD
Retailer 7$15,418 SGD
Retailer 1$17,043 SGD
Retailer 5$17,268 SGD
Retailer 3$19,331 SGD
Retailer 4$23,509 SGD
Retailer 2$25,260 SGD

44 data points across 7 retailers

18 retailers$14,169 SGD to $27,287 SGD

B+
Cheapest Retailer
-
$14,169 SGD
$11,055 USD
B+
Retailer 2
-
$14,687 SGD
$11,459 USD
View
B+
Retailer 3
-
$14,927 SGD
$11,646 USD
View
B+
Retailer 4
-
$15,031 SGD
CA$16,288 CAD
View
B
Retailer 5
-
$15,418 SGD
$12,029 USD
View
Final sale: no returns
B
Retailer 6
-
$15,829 SGD
$12,350 USD
View
B
Retailer 7
-
$16,088 SGD
$12,552 USD
View
B
Retailer 8
-
$17,043 SGD
£10,470 GBP
View
B
Retailer 9
-
$17,159 SGD
$13,388 USD
View
B
Retailer 10
-
$17,268 SGD
A$20,727 AUD
View
B
Retailer 11
-
$17,427 SGD
$13,597 USD
View
B
Retailer 12
-
$18,098 SGD
$14,120 USD
View
B
Retailer 13
-
$18,640 SGD
$14,543 USD
View
B
Retailer 14
-
$19,331 SGD
€14,364 EUR
View
B
Retailer 15
-
$23,509 SGD
ZAR 296,315 ZAR
View
B
Retailer 16
-
$25,260 SGD
£15,518 GBP
View
B
Retailer 17
-
$26,812 SGD
$20,919 USD
View
Most Expensive
B
Diamond Quarter
1.51SI1E1114893CN · Oct 29
$27,287 SGD
£16,763 GBP
View
17 more retailers have this diamond
Prices start from $14,169 SGDSave up to $13,118 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
$14,169 SGD