Rare and Collectable Gemstones and Diamonds
Long-standing relationships with the finest local and international merchants and cutters allows Greg to secure unique and exceptional pieces. Greg’s global network within the world’s best gemstone and cutting houses, often close to the stone’s origin, enables any gemstone or diamond to be found of almost unlimited variety and exquisite quality.
Greg Holland is renowned for his discretion and has built his 30-year career on the success of his sourcing and craftsmanship. Every purchase made is accompanied with the appropriate certificates and provenance.
5.04ct Brilliant cut Diamond
For its size, this triple excellent cut diamond is very good value for money. It has a G colour grade and a clarity of SI2 with dispersed inclusions. This diamond has a certificate from HRD in Antwerp. When purchasing an HRD Antwerp graded diamond, you can rest assured the characteristics described in its accompanying grading report have been thoroughly checked by our expert gemmologists.
Price on Application
Can be viewed by appointment
13.49ct Fine Blue Sapphire
Truly extraordinary and one of a kind, seldom do we see sapphires of such size and quality, this stunning investment piece is an exquisite deep royal blue. Greg has designed and incredible one of a kind piece with this stone in mind.
Price on Application
Can be viewed by appointment
5.90ct Ceylon Sapphire
A beautiful example of a cushion cut sapphire with incredible depth of colour. This stone is incredibly well-cut, making it very lively and bright. Greg has designed and incredible one of a kind piece with this stone in mind.
Price on Application
Can be viewed by appointment
1.73 Carat Pink Diamond
This is a very rare opportunity Argyle: 4PR, P1 / GIA - Fancy Intense Pink / I1.
From the Argyle tender. A stone for connoisseurs to invest in, it is well documented that the Argyle Mine is closing soon.
This stone is housed in New York and can be viewed by special arrangement. Conditions apply
Price on Application
Requires special arrangement to view
145.00ct Tanzanite
This astonishing 145.00 carat, natural Tanzanite Is a museum grade cushion cut and one of the largest gem-type quality Tanzanites ever to be mined.
This stone is housed in New York and can be viewed by special arrangement. Conditions apply
Price on Application
Requires special arrangement to view
12.06ct Oval Sapphire
A beautiful example of an oval cut sapphire with incredible depth of colour. This stone is incredibly well-cut, making it very lively and bright. Greg has designed and incredible one of a kind piece with this stone in mind.
Price on Application
Requires special arrangement to view
“Brilliant service, brilliant design and brilliant quality. Absolutely recommend for anyone looking for a custom made and quality ring. Cannot speak highly enough of Greg's care, knowledge, and customer service”
— Isaac & Consi
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