Round|Natural|GIA

1.51ct E SI1 Round Natural Diamond

EX • E/SI1 • GIA 2427279307

Certificate GIA 2427279307

Diamond specifications and retailer prices

From $11,663 SGD

$9,100 USD

As of October 25, 2026

Save $12,638 SGD (52%) vs most expensive(unlock to see where)

19 retailers carry this diamond

Most expensive: $24,301 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 2427279307. Listed at 19 retailers as of October 25, 2026, with prices from $11,663 to $24,301, a $12,638 spread on the same certified stone. Diamond Quarter lists it at $24,301. 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

Colour

SI1

Clarity

Excellent

Cut

Specifications

CutExcellent

PolishExcellent

SymmetryExcellent

FluorescenceNone

Crown angle32°

Pavilion angle41.4°

OriginNatural

Grading LabGIA

CertificateGIA 2427279307

Dimensions7.41 × 7.37 × 4.53 mm

L/W Ratio1.01

Star length50%

Lower girdle80%

View GIA Report →View Loupe360 Video →

Top View

OriginNatural

CutExcellent

PolishExcellent

SymmetryExcellent

FluorescenceNone

CertificateGIA 2427279307

Side View

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: $15,741 SGD|Low: $11,663 SGD|High: $20,168 SGD|Avg: $15,324 SGD|-1.0%

Retailer 1

Retailer 2

Retailer 3

Retailer 4

Retailer 5

Retailer 6

Retailer 7

Retailer 8

Retailer 9

October 30, 2026

Retailer 6$11,663 SGD

Retailer 8$11,839 SGD

Retailer 9$12,625 SGD

Retailer 2$13,877 SGD

Retailer 5$14,049 SGD

Retailer 3$15,397 SGD

Retailer 1$15,741 SGD

Retailer 7$18,521 SGD

Retailer 4$20,034 SGD

42 data points across 9 retailers

19 retailers$11,663 SGD to $24,301 SGD

B+

Cheapest Retailer

$11,663 SGD

$9,100 USD

B+

Retailer 2

$11,839 SGD

$9,237 USD

View

B+

Retailer 3

$12,625 SGD

$9,850 USD

View

B+

Retailer 4

$12,761 SGD

$9,956 USD

View

B+

Retailer 5

$13,823 SGD

$10,785 USD

View

B+

Retailer 6

$13,877 SGD

£8,525 GBP

View

B+

Retailer 7

$14,036 SGD

$10,951 USD

View

B+

Retailer 8

$14,049 SGD

A$16,864 AUD

View

B+

Retailer 9

$14,957 SGD

$11,670 USD

View

B+

Retailer 10

$14,957 SGD

$11,670 USD

View

B+

Retailer 11

$15,397 SGD

€11,441 EUR

View

B+

Retailer 12

$15,741 SGD

£9,671 GBP

View

Retailer 13

$15,951 SGD

$12,445 USD

View

Retailer 14

$16,701 SGD

$13,030 USD

View

Retailer 15

$16,789 SGD

$13,099 USD

View

Price last confirmed 7 days ago

Retailer 16

$18,521 SGD

ZAR 233,452 ZAR

View

Price last confirmed 12 days ago

Retailer 17

$20,034 SGD

£12,308 GBP

View

Retailer 18

$21,267 SGD

$16,593 USD

View

Most Expensive

Diamond Quarter

1.51SI1E2407034AN · Oct 29

$24,301 SGD

£14,929 GBP

View

18 more retailers have this diamond

Prices start from $11,663 SGDSave up to $12,638 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.

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B+

1.51ct Round

$11,663 SGD