Amphora / Qvevri / Tinajas / Dolium (Clay Vessel Winemaking — Georgia, Spain, Italy)

Clay vessels used in winemaking represent humanity's oldest fermentation technology, with regional variations reflecting local clay, cultural practice, and function. The Georgian qvevri is an egg-shaped clay vessel with a narrow bottom and wide mouth, made entirely by hand using the coil technique, fired in kilns, then lined with beeswax on the interior and coated with lime on the exterior. Qvevri are buried in the ground of the marani (wine cellar) with only the rim visible above the surface, a practice that maintains stable fermentation temperatures. Spanish tinajas in Montilla-Moriles are typically very large concrete or earthenware vessels of around 6,000 liters, built in situ from the bottom up. Italian dolia were oval, handle-free fired clay vessels lined with pitch or wax, integral to Roman-era vinification and trade across the Mediterranean. All of these vessels share a common principle: their porous or semi-porous earthenware composition facilitates gas exchange and creates a distinct fermentation environment unavailable in sealed modern tanks.

• Qvevri are made using the coil method entirely by hand; while still warm from the kiln, melted beeswax is applied to the interior surface to smooth cracks and act as an antiseptic, while the exterior is coated with lime for structural strength
• Traditional qvevri-making is concentrated in a handful of villages in Imereti (including Shrosha) and Kakheti (Vardisubani); only a few families still practice the craft, and demand from both Georgian and international producers has created waiting lists of up to a year
• Montilla-Moriles tinajas, some holding up to 10,000 liters, were built in situ directly on winery floors; they are now recognized as both heritage infrastructure and a tool for contemporary terroir-driven winemaking
• Roman dolia were oval with no neck or handles, lined with pitch or wax, and capable of holding well over 1,000 liters; they were sometimes partially buried in winery floors to stabilize temperature, a practice documented across sites from Pompeii to Puglia

The earthenware structure of qvevri and related vessels creates a winemaking environment distinct from stainless steel or oak. When qvevri are buried underground, the surrounding earth maintains a relatively constant temperature of approximately 13 to 15 degrees Celsius, which promotes slow, steady fermentation and allows indigenous yeasts to operate without the temperature extremes that can occur in above-ground vessels. The egg-like geometry of the qvevri encourages free circulation of fermenting juice and solids during alcoholic fermentation, reducing the need for pumpover or other mechanical intervention. The traditional Kakhetian winemaking method involves fermenting white grapes with their full complement of skins, stalks, and pips in a sealed qvevri for five to six months, producing the distinctive amber or orange wines for which Georgia is celebrated internationally. The Imeretian method uses only a portion of the pomace (roughly one tenth), omits stems, and produces wines closer to European styles while still retaining the characteristic qvevri profile.

• Underground placement maintains fermentation temperatures at approximately 13 to 15 degrees Celsius, creating a naturally stable environment without refrigeration or external temperature control
• The egg shape of the qvevri allows wine to circulate freely during fermentation, encouraging gentle contact between juice and solids without requiring mechanical pumpovers
• In the Kakhetian method, juice, skins, stalks, and pips ferment together in a sealed qvevri for five to six months; the Imeretian method uses only about one tenth of the pomace and no stems, producing lighter, less tannic styles
• Beeswax lining the qvevri interior acts as an antiseptic and seals invisible cracks while still allowing the wine to remain in contact with the clay walls, maintaining the vessel's characteristic interaction with the wine

Wines fermented and aged in clay vessels develop a distinctive profile that differs markedly from those produced in stainless steel or oak. Georgian amber wines made from white grapes such as Rkatsiteli, Mtsvane, or Kisi in the Kakhetian method show deep golden to amber colors, grippy tannins derived from extended skin contact, and flavors of apricot jam, candied orange peel, green tea, dried yellow fruits, and saline mineral. Skin-contact red wines from varieties like Saperavi show deep blue-black fruit, savory mushroom and umami notes, and chalky tannins. In Montilla-Moriles, Pedro Ximenez fermented in tinajas produces the traditional base wine known as Vino de Tinaja, a pale, fruity, unoaked white that serves as the foundation for biologically aged styles, sometimes developing light flor yeast influence during vessel aging. On Etna, producers using terracotta amphorae buried in volcanic bedrock aim for wines that express the high-altitude volcanic terroir without the influence of wood or flavored vessels.

• Georgian amber qvevri wines fermented on skins show apricot, candied orange peel, green tea, and dried yellow fruit aromatics, with chewy tannins and elevated acidity from the natural fermentation environment
• Red qvevri wines from Saperavi develop deep color, blue-black fruit, savory mushroom and umami qualities, and gentle chalky tannins from extended skin maceration
• Montilla-Moriles Vino de Tinaja, made from Pedro Ximenez in large tinajas, is typically pale, fruity, and unoaked, sometimes aged with a light flor influence that imparts saline, yeasty complexity
• All clay vessel wines share a textural richness and absence of oak-derived vanilla or spice, allowing grape variety and site to dominate the aromatic profile

Clay vessel winemaking has three primary centers of continuous historical practice and a growing network of international adopters. In Georgia, qvevri fermentation is practiced throughout the country, most prominently in the eastern region of Kakheti, which is home to the majority of Georgia's wine production, as well as in Imereti, Kartli, and coastal regions. In Montilla-Moriles, situated south of Cordoba in Andalucia, large concrete and earthenware tinajas are a defining physical feature of the region's bodegas, with Pedro Ximenez representing nearly 96 percent of all plantings. In Italy, modern producers on Mount Etna and in Tuscany have adopted terracotta amphorae (giarre) buried in volcanic rock or cellar floors as a neutral, low-intervention aging vessel. Beyond these historic regions, the practice of qvevri and amphora fermentation has spread to Slovenia, Austria, Croatia, Armenia, and the United States, driven by global interest in natural and orange wines.

• Georgian qvevri winemaking is practiced throughout the country, with Kakheti the dominant region; key producers include Pheasant's Tears, founded in 2007 in Sighnaghi by John Wurdeman and Gela Patalishvili, which ferments exclusively in qvevri with no oak or stainless steel
• Montilla-Moriles DO, established formally in 1945 with its Consejo Regulador founded in 1944, is home to large tinajas used historically to ferment Pedro Ximenez for Vino de Tinaja; Alvear, founded in 1729 and the oldest winery in the region, uses tinajas at its Lagar de las Puentes facility in the Sierra de Montilla
• On Mount Etna, Frank Cornelissen, who established his estate in 2001, ages his more structured wines in epoxy-coated terracotta vessels buried to the neck in the volcanic bedrock beneath his cellar
• Qvevri use has spread internationally to Slovenia, Croatia, Austria, Armenia, and the United States, where producers incorporate the vessel into natural wine programs often focused on extended skin contact and minimal sulfite additions

Georgian producers have become global ambassadors for qvevri winemaking. Pheasant's Tears, founded in 2007 by John Wurdeman and Gela Patalishvili in Sighnaghi, Kakheti, ferments all wines exclusively in qvevri using wild yeasts with no additions, working with internationally recognized varieties such as Rkatsiteli and Saperavi as well as more than 117 identified indigenous Georgian grapes. The winery's Rkatsiteli amber wine shows notes of orange rind, apricot, and blossom flowers, while its Saperavi displays blue-black fruit, savory mushroom umami, and chalky tannins. In Montilla-Moriles, Alvear (founded 1729) operates tinajas at its Sierra de Montilla facility, collaborating with Envinate on the Tres Miradas project, fermenting and aging Pedro Ximenez under flor in tinajas to create terroir-focused unfortified whites. Lagar Blanco is another established producer of Vino de Tinaja, sourcing Pedro Ximenez from north-facing plots in the Sierra. On Etna, Frank Cornelissen uses epoxy-coated terracotta amphorae buried in volcanic rock, producing some of the most sought-after natural wines in Italy from ungrafted, high-altitude Nerello Mascalese vines.

• Pheasant's Tears (Sighnaghi, Kakheti, founded 2007): all wines fermented in qvevri, bottled unfined and unfiltered with no added sulfites; John Wurdeman also co-founded Tbilisi's first natural wine bar, Vino Underground, in 2010
• Alvear (Montilla, founded 1729): the oldest winery in Montilla-Moriles, uses tinajas at its Lagar de las Puentes facility; the Tres Miradas project with Envinate ferments and ages single-vineyard Pedro Ximenez under flor in tinajas
• Lagar Blanco (Sierra de Montilla): a veteran Vino de Tinaja producer, acquired by agronomist Miguel Cruz in 1985, sourcing old-vine Pedro Ximenez from north-facing Sierra plots for one of the category's most consistent expressions
• Frank Cornelissen (Etna DOC, established 2001): uses epoxy-coated terracotta amphorae (giarre) buried in volcanic bedrock for his more structured cuvees; his first officially bottled vintage was 2001 and his Magma tops the range from ungrafted Nerello Mascalese vines at over 830 meters elevation

Winemakers implementing clay vessel fermentation manage several technical variables that differ from stainless steel or oak programs. The underground placement of qvevri naturally stabilizes fermentation temperature at around 13 to 15 degrees Celsius, supporting slow indigenous yeast activity without mechanical refrigeration. After fermentation, the qvevri is sealed with a lid secured with clay or beeswax and the wine macerates on its solids for months before being decanted and transferred for additional aging or bottling. Cleaning qvevri requires climbing inside the vessel to scrub the walls manually, followed by alkaline rinses, and the interior must be re-coated with beeswax before the next vintage. Because only a handful of skilled craftspeople still produce qvevri in a few villages across Kakheti, Imereti, and Guria, demand has outpaced supply and waiting times for new vessels can reach up to a year. Montilla-Moriles tinajas present different logistical challenges: their very large size (often 6,000 liters) means they were typically built in situ and cannot be moved, functioning as fixed winery infrastructure rather than portable vessels. For producers on Etna and elsewhere in Italy, purpose-made terracotta amphorae (giarre) are increasingly used as free-standing or partially buried vessels for skin-contact fermentation and neutral aging.

• Cleaning a qvevri requires manual scrubbing of the interior walls, followed by alkaline rinses until the water runs clear; the vessel is then re-coated with beeswax before use, a labor-intensive process that must be completed each vintage
• Only a few families still produce qvevri in three Georgian regions (Kakheti, Imereti, and Guria); demand from Georgian and international producers has created waiting lists of up to a year for new vessels
• Large Montilla-Moriles tinajas (up to 10,000 liters) were built in situ from the bottom up and cannot be relocated; they function as fixed infrastructure within the bodega and are increasingly valued by contemporary natural winemakers for terroir-expressive, unfortified styles
• Well-maintained qvevri can last for centuries; however, if cracked they cannot be repaired, making careful handling during transport and installation critical to the vessel's longevity