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Round|Lab Grown|IGI

6.18ct D IF Round Lab Grown Diamond

ID • D/IF • IGI LG773639253

Shape and cutting style on the report: Round brilliant

Certificate IGI LG773639253

Diamond specifications and retailer prices

From $20,538 NZD
$11,575 USD
As of October 29, 2026
Save $71,478 NZD (78%) vs most expensive(unlock to see where)
24 retailers carry this diamond
Most expensive: $92,015 NZD at Do Amore Diamonds · As of October 31, 2026
View at Do Amore Diamonds

About this 6.18ct lab-grown round diamond

This 6.18ct lab-grown round sits in the over five carat band, graded D colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG773639253 or 773639253. Listed at 24 retailers as of October 29, 2026, with prices from $20,538 to $92,015, a $71,478 spread on the same certified stone. Do Amore Diamonds lists it at $92,015. Lab-grown prices in the 2ct and up range have fallen 40 to 60% over the last 18 months. Use the cross-retailer spread above to find the lowest current listing.

The 4Cs

6.18
Carat
D
Colour
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.2°
Pavilion angle41.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG773639253
Dimensions11.70 × 11.72 × 7.31 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizePointed
Cert comments
As Grown - No indication of post-growth treatment This Laboratory Grown Diamond was created by High Pressure High Temperature (HPHT) growth process Type II
Top View
11.70 mm11.72 mm6.18 ctD / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG773639253
Side View
Table 57.0%Crown 35.2°Girdle: MED-STKPavilion 41.1°Culet: NoneDepth 62.4%

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: $30,624 NZD|Low: $19,716 NZD|High: $70,791 NZD|Avg: $35,445 NZD|+1.3%
Retailer 1
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
Retailer 15
Retailer 16
November 1, 2026
Retailer 16$20,538 NZD
Retailer 5$21,359 NZD
Retailer 14$22,019 NZD
Retailer 8$23,002 NZD
Retailer 2$23,824 NZD
Retailer 12$23,829 NZD
Retailer 6$24,645 NZD
Retailer 15$25,277 NZD
Retailer 1$30,624 NZD
Retailer 10$38,697 NZD
Retailer 11$42,201 NZD
Retailer 13$49,606 NZD
Retailer 9$50,886 NZD
Retailer 3$53,371 NZD
Retailer 7$53,371 NZD
Retailer 4$61,096 NZD

44 data points across 16 retailers

24 retailers$20,538 NZD to $92,015 NZD

A
Cheapest Retailer
-
$20,538 NZD
$11,575 USD
A
Retailer 2
-
$21,359 NZD
$12,038 USD
View
Retailer 3
-
$22,019 NZD
$12,410 USD
View
Price last confirmed 14 days ago
A
Retailer 4
-
$23,002 NZD
$12,964 USD
View
Final sale: no returns
A
Retailer 5
-
$23,824 NZD
$13,427 USD
View
Retailer 6
-
$23,824 NZD
$13,427 USD
View
Price last confirmed 16 days ago
A
Retailer 7
-
$23,829 NZD
$13,430 USD
View
A
Retailer 8
-
$24,280 NZD
$13,684 USD
View
A
Retailer 9
-
$24,645 NZD
$13,890 USD
View
A
Retailer 10
-
$25,277 NZD
$14,246 USD
View
A
Retailer 11
-
$26,400 NZD
$14,879 USD
View
A
Retailer 12
-
$30,624 NZD
£13,590 GBP
View
B+
Retailer 13
-
$38,697 NZD
£17,173 GBP
View
B+
Retailer 14
-
$42,201 NZD
€22,652 EUR
View
Retailer 15
-
$49,606 NZD
A$43,012 AUD
View
Price last confirmed 9 days ago
B+
Retailer 16
-
$50,886 NZD
ZAR 463,322 ZAR
View
B+
Retailer 17
-
$53,371 NZD
$30,080 USD
View
B+
Retailer 18
-
$53,371 NZD
$30,080 USD
View
B+
Retailer 19
-
$61,096 NZD
$34,434 USD
View
B
Retailer 20
-
$65,560 NZD
$36,950 USD
View
B
Retailer 21
-
$70,791 NZD
$39,898 USD
View
B
Retailer 22
-
$75,094 NZD
$42,323 USD
View
Most Expensive
B
Do Amore Diamonds
27-15A20E95B · Oct 31
$92,015 NZD
$51,860 USD
View
22 more retailers have this diamond
Prices start from $20,538 NZDSave up to $71,478 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
6.18ct Round
$20,538 NZD