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1.51ct H SI2 Round Natural Diamond

EX • H/SI2 • GIA 2125868320

Certificate GIA 2125868320

Diamond specifications and retailer prices

From $11,361 SGD
$8,887 USD
As of October 30, 2026
Save $10,510 SGD (48%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: $21,871 SGD at Diamond Quarter · As of October 31, 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 H colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by GIA 2125868320. Listed at 19 retailers as of October 30, 2026, with prices from $11,361 to $21,871, a $10,510 spread on the same certified stone. Diamond Quarter lists it at $21,871. 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
H
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishVery Good
SymmetryVery Good
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 2125868320
Dimensions7.37 × 7.35 × 4.56 mm
L/W Ratio1.00
Culet sizeNone
Top View
7.37 mm7.35 mm1.51 ctH / SI2
OriginNatural
CutExcellent
PolishVery Good
SymmetryVery Good
FluorescenceFaint
CertificateGIA 2125868320
Side View
Table 57.0%CrownGirdle: MediumPavilionCulet: NoneDepth 62.0%

Caratlytics Score

How it works →
B
Good
Decent quality, room for better deals
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 30
Current: $19,506 SGD|Low: $10,407 SGD|High: $20,815 SGD|Avg: $15,015 SGD|-0.1%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 1, 2026
Retailer 6$11,116 SGD
Retailer 7$12,489 SGD
Retailer 10$12,489 SGD
Retailer 11$13,531 SGD
Retailer 4$13,580 SGD
Retailer 8$13,738 SGD
Retailer 5$14,959 SGD
Retailer 9$15,612 SGD
Retailer 3$16,435 SGD
Retailer 1$19,506 SGD
Retailer 2$20,815 SGD

40 data points across 11 retailers

19 retailers$11,361 SGD to $21,871 SGD

Retailer 1
-
$11,116 SGD
$8,695 USD
Price last confirmed 7 days ago
B
Retailer 2
-
$11,361 SGD
$8,887 USD
View
B
Retailer 3
-
$11,587 SGD
$9,064 USD
View
B
Retailer 4
-
$12,020 SGD
CA$13,059 CAD
View
B
Retailer 5
-
$12,489 SGD
$9,769 USD
View
B
Retailer 6
-
$12,489 SGD
$9,769 USD
View
Final sale: no returns
B
Retailer 7
-
$13,531 SGD
$10,584 USD
View
B
Retailer 8
-
$13,580 SGD
£8,364 GBP
View
B
Retailer 9
-
$13,738 SGD
$10,746 USD
View
B
Retailer 10
-
$14,410 SGD
$11,272 USD
View
B
Retailer 11
-
$14,650 SGD
$11,460 USD
View
B
Retailer 12
-
$14,650 SGD
$11,460 USD
View
B
Retailer 13
-
$14,959 SGD
€11,144 EUR
View
B
Retailer 14
-
$15,149 SGD
$11,850 USD
View
B
Retailer 15
-
$15,612 SGD
$12,212 USD
View
Retailer 16
-
$16,435 SGD
$12,856 USD
View
Price last confirmed 9 days ago
B
Retailer 17
-
$19,506 SGD
£12,014 GBP
View
B
Retailer 18
-
$20,815 SGD
$16,282 USD
View
Most Expensive
B
Diamond Quarter
1.51SI2H2120A7B6N · Oct 31
$21,871 SGD
£13,471 GBP
View
18 more retailers have this diamond
Prices start from $11,361 SGDSave up to $10,510 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
$11,361 SGD