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Oval|Natural|GIA

1.00ct E SI1 Oval Natural Diamond

EX • E/SI1 • GIA 1558951120

Certificate GIA 1558951120

Diamond specifications and retailer prices

From $3,900 NZD
SGD 2,970 SGD
As of October 29, 2026
Save $3,379 NZD (46%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: $7,278 NZD at Helzberg Diamonds · As of October 30, 2026
View at Helzberg Diamonds

About this 1ct natural oval diamond

This 1ct natural oval sits in the classic one-carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 1558951120. Listed at 14 retailers as of October 29, 2026, with prices from $3,900 to $7,278, a $3,379 spread on the same certified stone. Helzberg Diamonds lists it at $7,278. 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

1.00
Carat
E
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Crown angle39.81°
Pavilion angle40.7°
OriginNatural
Grading LabGIA
CertificateGIA 1558951120
Dimensions7.89 × 5.68 × 3.54 mm
L/W Ratio1.39
Culet sizeNone
Top View
7.89 mm5.68 mm1.00 ctE / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 1558951120
Side View
Table 61.0%Crown 39.81°Girdle: THN-THKPavilion 40.7°Culet: NoneDepth 62.3%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 29
Current: $7,278 NZD|Low: $3,900 NZD|High: $7,738 NZD|Avg: $5,268 NZD|-5.9%
Helzberg Diamonds
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
October 30, 2026
Retailer 12$3,900 NZD
Retailer 10$4,163 NZD
Retailer 11$4,209 NZD
Retailer 13$4,235 NZD
Retailer 9$4,329 NZD
Retailer 7$4,566 NZD
Retailer 5$4,610 NZD
Retailer 14$4,988 NZD
Retailer 4$5,215 NZD
Retailer 2$5,312 NZD
Retailer 8$5,453 NZD
Retailer 6$6,455 NZD
Retailer 3$6,976 NZD
Helzberg Diamonds$7,278 NZD

32 data points across 14 retailers

14 retailers$3,900 NZD to $7,278 NZD

A
Cheapest Retailer
-
$3,900 NZD
SGD 2,970 SGD
A
Retailer 2
-
$4,163 NZD
$2,346 USD
View
A
Retailer 3
-
$4,209 NZD
$2,372 USD
View
A
Retailer 4
-
$4,235 NZD
$2,387 USD
View
A
Retailer 5
-
$4,329 NZD
$2,440 USD
View
A
Retailer 6
-
$4,566 NZD
£2,026 GBP
View
A
Retailer 7
-
$4,610 NZD
SGD 3,511 SGD
View
A
Retailer 8
-
$4,988 NZD
$2,811 USD
View
A
Retailer 9
-
$5,215 NZD
$2,939 USD
View
B+
Retailer 10
-
$5,312 NZD
$2,994 USD
View
B+
Retailer 11
-
$5,453 NZD
€2,927 EUR
View
B+
Retailer 12
-
$6,455 NZD
$3,638 USD
View
B+
Retailer 13
-
$6,976 NZD
$3,932 USD
View
Most Expensive
B+
Helzberg Diamonds
XZRHLLOPLHHIG · Oct 30
$7,278 NZD
$4,102 USD
View
13 more retailers have this diamond
Prices start from $3,900 NZDSave up to $3,379 NZD

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.

A
1.00ct Oval
$3,900 NZD