How often does one get to try what is commonly regarded as New Zealand’s greatest wine? Not often, I would say, and certainly not in my case. What is that wine? Hint: It ain’t sauvignon blanc.

I was at a meeting last week of a new board for the glossy year-old local wine magazine Cork It! Memphis, and of course people on the board of a wine magazine would bring wine to the meeting, n’est-ce pas? I took a bottle of the Trimbach Gewurztraminer 2007, a wine transcending to a state of beautiful pure minerality. Enough of that though, because another member of the board brought the Te Mata Estate Coleraine Cabernet/Merlot 1998, Hawkes Bay, New Zealand. That’s right, 1998. Where do people get these wines?

The Hawkes Bay wine region (without an apostrophe) occupies a semi-circle of geography around Hawke’s Bay in the southeast area of New Zealand’s North Island. Muddying the waters, however, the Hawkes Bay wine region is sometimes also written with an apostrophe, so if you are the kind of person who gets Stag’s Leap, Stags’ Leap and Stags Leap mixed up, you’ll be right at home here. Though the region is the oldest wine-producing area of New Zealand — the first winery was established there in 1851 — and home now to about 75 wineries, that’s a recent development, in vinous terms; even in the early 1970s, there were fewer than 10.

The winery dates back to 1896 and was acquired by present owner John Buck in 1974. Launched in 1982, Coleraine was made from a single vineyard until 1988; since that vintage, it has been made from parcels of vines in other Te Mata estate vineyards but with the preponderance of the cabernet sauvignon coming from the original Coleraine Vineyard.

Te Mata Estate Coleraine Cabernet/Merlot 1998, Hawkes Bay, is a blend of 68 percent cabernet sauvignon and 32 percent merlot. The wine aged 20 months in French oak barriques. The estate’s website touts Coleraine as a 10 to 15-year wine, and I would say that at the age of 14 it’s definitely fully mature and will remain on this plateau for another four to six years. The wine — this bottle, anyway — was as smooth and mellow as you could ask a cabernet/merlot blend to be, with richness and succulence defining the spicy, slightly macerated black currant and plum aromas and flavors, while structure was founded on depths of well-honed tannins and polished oak which, like the Holy Spirit, were everywhere present but nowhere visible. Beyond those factors was a permeation of earthy, graphite-like minerality and still vital (and essential) acidity that tied the wine together, both lively and grounded. Wines like Coleraine Cabernet/Merlot 1998 exist on a plane of integrity, confidence and completeness all their own; when the opportunity to taste one comes along, take it and thank the people who can afford it and offered you a glass. I don’t mind being humble. Current vintage is 2010. Excellent. About $110.