Diam
Diam. I am. 
Welcome to the portal that publicly exposes the clever, innovative thinkers of the (mainly) Australian and New Zealand wine industries for what they really are; clever, and innovative. Here you will find all those who have adopted the DIAM cork as their closure of choice, or who are currently conducting internal trials for its prospective future use.
But, what is DIAM?
DIAM is short for DIAMANT and refers to an exclusive, patented process that treats natural cork particles with supercritical carbon dioxide to render the composite product void of TCA taint. The process and ideology is not dissimilar to the techniques used for extraction of caffiene from coffee. Special, miniature, synthetic spheres are used to form the cork conglomerate, further adding to the closure’s structural integrity. Unlike natural cork, DIAM corks will always be consistently identical (thus no oxidation issues) and, according to its manufacturers, 100% free of TCA cork taint.
In other words, the answer to all our prayers.
I’ve had some people scoff at the use of these closures, claiming that they would never put faith in some plastic and glue concoction (a crude and false simplification). I smile. It would seem that they’ve been much happier dealing with a piece of tree bark.
Below is a list - kept as up to date as possible - of wineries currently using DIAM, itemised by country, with the focus on Australia and New Zealand. If you have any updates, or information you wish to share, please contact Graham or Max.
Australia
Amberley Edge - Granite Belt
Artemis Wines - Southern Highlands
Austin’s Barrabool - Geelong
Blank Canvas - Yarra Valley
Bethany - Barossa Valley
Bindi - Macedon Ranges
Blue Pyrenees - Pyrenees
Boireann - Granite Belt
Botobolar - Mudgee
Box Stallion - Mornington Peninsula
Capercaillie - Hunter Valley
Carlei - Victoria
Casley Mount Hutton - Granite Belt
Castagna - Beechworth
Celestial Bay - Margaret River
Clonakilla - Canberra
Cobaw Ridge - Macedon Ranges
Curlewis - Geelong
Craiglee - Sunbury
Dalwhinnie - Pyrenees
D’Arenberg - McLaren Vale
David Lowe Family Wines - Mudgee
De Beaurepaire Wines - Rylstone
Deep Woods - Margaret River
Dindima Wines - Orange
Domaine Jardin (Cigale) - Barossa Valley
Dowie Doole - McLaren Vale
Epis - Macedon Ranges
Five Geese - McLaren Vale
Forester - Margaret River
Fox Gordon Wines - Barossa Valley
Frog Rock Wines - Mudgee
Gembrook Hill - Yarra Valley
Gemtree - McLaren Vale
Hanging Rock - Macedon Ranges
Hugh Hamilton - McLaren Vale
Hurley Vineyard - Mornington Peninsula
Ivanhoe Wines - Hunter Valley
Kalari Wines - Cowra
Kelman Vineyards - Hunter Valley
Kominos - Granite Belt
Koonowla - Clare Valley
Kooyong - Mornington Peninsula
Kurrajong Downs - Northern Slopes (Tenterfield)
Lethbridge - Geelong
Lindsays Wodonga Hill - Young
Mansfield Wines - Mudgee
McGuigan Simeon Wines - Hunter Valley
Mount Mary - Yarra Valley
Passing Clouds - Bendigo
Piggs Peake - Hunter Valley
Port Phillip - Mornington Peninsula
Pyramids Rd Wines - Granite Belt
Redbank - Pyrenees
Red Clay Estate - Mudgee
Rogues Lane - Heathcote
Rosenvale - Barossa Valley
Rymill - Coonawarra
Sandhurst Ridge - Bendigo
Scorpo - Mornington Peninsula
Schild Estate - Barossa Valley
Sharpe’s Wines of Orange - Orange
Shingleback - McLaren Vale
Stanley Lambert - Barossa Valley
Stanton & Killeen - Rutherglen
Sutton Grange - Bendigo
Tempus Two - Hunter Valley
Thistle Hill - Mudgee
Toorak Wines - Leeton
Tyrrell’s Wines - Hunter Valley
Vinea Marson - Heathcote
Wantirna Estate - Yarra Valley
Warrabilla - Rutherglen
William Downie - Yarra Valley
Wirra Wirra - McLaren Vale
Wright Robertson of Glencoe - Northern Slopes (Glencoe)
Yabby Lake - Mornington Peninsula
Yarra Yarra - Yarra Valley
Yering Farm - Yarra Valley
New Zealand
Amisfield - Central Otago
Askerne - Hawkes Bay
Bilancia - Hawkes Bay
Black Ridge - Central Otago
Burings - Martinborough
Clearview Estate - Hawkes Bay
Domaine George Michel - Marlborough
Escarpment - Martinborough
Fromm Winery - Marlborough
Huia - Marlborough
Hyperion Wines - Matakana
Johanneshof - Marlborough
Kahurangi Estate - Nelson
Kemblefield - Hawkes Bay
Loopline Vineyard - Martinborough
Martinborough Vineyard - Martinborough
Mission Estate - Hawkes Bay
Ngatarawa - Hawkes Bay
Odyssey - Auckland
Palliser - Martinborough
Ransom - Matakana
Rippon - Central Otago
Sandihurst - Canterbury
Spencer Hill - Nelson
Stonecroft - Hawkes Bay
Te Mania - Nelson
Te Mata - Hawkes Bay
Trinity Hill - Hawkes Bay
Unison - Hawkes Bay
Vilagrad - Waikato
France
Augis de Pere et Fils - Touraine
Billicart Salmon - Champagne
Bouchard Pere et Fils - Burgundy
Charles Heidsieck - Champagne
J M Gobillard et Fils - Champagne
E Guigal - Rhone Valley
Hugel - Alsace
Maison Louis Jadot - Burgundy
Moet & Chandon - Champagne
Maison Moillard - Burgundy
Veuve Clicquot - Champagne
Germany
Schlossberg Kellerei
Weingut Moll
Weingut Veit
Austria
Forstreiter - Kremstal
Weingut Boheim - Carnuntum
Switzerland
Fromm Winery
Domaine Bovy
Montenegro
Plantaze Winery
Bulgaria
Black Sea Gold Winery
South Africa
Haskell Vineyards - Stellenbosch
United States
Benessere Vineyards - Napa Valley
Campion - Napa Valley
Chateau Potelle - Napa Valley
Copain Wines - Sonoma
Cosentino Winery - Napa Valley
David Noyes Wines - Sonoma
Freemark Abbey - Napa Valley
Girard Winery - Napa Valley
Green and Red - Napa Valley
Hanna Winery - Sonoma
Kramer Vineyards - Oregon
Kunde Winery - Sonoma
Martin Ray Winery - Sonoma
Paradise Ridge - Sonoma
Pax Wine Cellars - Sonoma
Ray Station - Sonoma
Robert Pecota Winery - Napa Valley
Stonestreet - Sonoma
Summers Villa Adriana - Napa Valley
Tom Eddy Wines - Napa Valley
T Vine Vineyards - Napa Valley
X Winery - Napa Valley
Canada
Ridgepoint Wines