The 2013 Arkenstone Vineyard Obsidian is a proprietary red blend hailing from Howell Mountain in Napa, California. This wine is a product of Arkenstone Vineyard, known for its meticulous wine-making techniques and high-quality offerings. The 2013 vintage is composed of 72% Cabernet Sauvignon, 10% Cabernet Franc, 7% Petit Verdot, with small portions of Malbec and Merlot. It is bottled under cork closure and has an alcohol content of 14.5%.

Robert Parker's Wine Advocate awarded this wine an impressive 98 points, describing it as having "an opaque purple color and a stunning nose of acacia flowers, blackberries, licorice, forest floor, mocha/chocolate, and gobs of cassis fruit." Parker further praised the wine's "great intensity, full-bodied, multi-layered mouthfeel, stunning purity, and a length of 45+ seconds." Parker concluded that this wine is a "full-throttle, yet beautifully intense Napa Cabernet Sauvignon that should drink well for 20-30 years."

James Suckling also gave the 2013 Obsidian a high score of 95 points. He noted its "blackcurrant and wet-earth aromas and flavors" and highlighted its "full body, chewy tannins and a long, flavorful finish." Suckling described the wine as "rich yet full of tension," suggesting it would be "better in 2019."

Decanter provided another glowing review, scoring the wine at 97 points. They described it as a "lovely Bordeaux blend from this Howell Mountain property, owned by Ron and Susan Krausz." Decanter detailed the wine's aging process: "each block aged 11 months in 100% new French oak, then blended and aged another 11 months before bottling," with only 625 cases produced. They highlighted its "deeply earthy" characteristics, with "notes of crushed stones, dark espresso, vanilla, dried flowers, and sweet tobacco." The wine's flavors were described as "satiny blackberry, plum, and blueberry," supported by "grippy yet integrated tannins," leading to a "long finish of scorched herbs and underbrush."

In summary, the 2013 Arkenstone Vineyard Obsidian is a highly-rated, complex, and intensely flavored wine that exemplifies the quality and craftsmanship of Howell Mountain's terroir.