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Cushion|Natural|GIA

1.05ct J SI1 Cushion Natural Diamond

EX • J/SI1 • GIA 6511232942

Certificate GIA 6511232942

Diamond specifications and retailer prices

From HK$18,537 HKD
A$3,635 AUD
As of November 3, 2026
Save HK$10,343 HKD (36%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: HK$28,880 HKD at 77 Diamonds · As of November 3, 2026
View at 77 Diamonds

About this 1.05ct natural cushion diamond

This 1.05ct natural cushion sits in the classic one-carat band, graded J colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 6511232942. Listed at 6 retailers as of November 3, 2026, with prices from HK$18,537 to HK$28,880, a HK$10,343 spread on the same certified stone. 77 Diamonds lists it at HK$28,880. 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

1.05
Carat
J
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.84°
OriginNatural
Grading LabGIA
CertificateGIA 6511232942
Dimensions7.08 × 5.45 × 3.69 mm
L/W Ratio1.30
Top View
7.08 mm5.45 mm1.05 ctJ / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6511232942
Side View
Table 61.0%Crown 33.84°Girdle: MED-THKPavilionCulet: NoneDepth 67.7%

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 3
Current: HK$28,880 HKD|Low: HK$17,677 HKD|High: HK$28,946 HKD|Avg: HK$22,255 HKD|+2.1%
77 Diamonds
Retailer 2
Retailer 3
November 3, 2026
Retailer 3HK$18,940 HKD
Retailer 2HK$19,442 HKD
77 DiamondsHK$28,880 HKD

36 data points across 3 retailers

6 retailersHK$18,537 HKD to HK$28,880 HKD

B+
Cheapest Retailer
-
HK$18,537 HKD
A$3,635 AUD
B
Retailer 2
-
HK$18,796 HKD
$2,396 USD
View
B
Retailer 3
-
HK$18,940 HKD
$2,414 USD
View
B
Retailer 4
-
HK$19,442 HKD
$2,478 USD
View
Final sale: no returns
B
Retailer 5
-
HK$20,086 HKD
$2,560 USD
View
Most Expensive
B
77 Diamonds
CUSDHY3SAUEMT · Nov 3
HK$28,880 HKD
£2,898 GBP
View
5 more retailers have this diamond
Prices start from HK$18,537 HKDSave up to HK$10,343 HKD

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+
1.05ct Cushion
HK$18,537 HKD