Concho: The Stamped Silver Disc of Southwestern Jewellery
Concho: The Stamped Silver Disc of Southwestern Jewellery
From Spanish bridle ornament to iconic emblem of Navajo and Pueblo silversmithing
The concho (also spelled concha, from the Spanish for shell) is a decorative disc or oval plaque of hammered, stamped, or cast silver that forms the fundamental unit of Southwestern Native American jewellery, most notably the celebrated concho belt. Rooted in a convergence of Spanish colonial metalworking traditions and Indigenous craft, the concho has evolved over roughly a century and a half into one of the most recognisable and culturally significant forms in the history of American jewellery. Its importance extends beyond aesthetics: the concho belt functions as portable wealth, ceremonial regalia, and a living record of a silversmith's skill.
Etymology and Historical Origins
The word derives directly from the Spanish concha, meaning shell or conch, a reference to the rounded, shell-like profile of the ornaments that Spanish and Mexican horsemen attached to bridles, saddles, and leather tack from at least the seventeenth century onward. These conchas de plata — silver shell-forms — were themselves descended from Moorish and broader Mediterranean traditions of adorning horse gear with hammered metal discs. When Navajo and other Pueblo peoples encountered Spanish colonial metalwork in the American Southwest, they absorbed and transformed the vocabulary of the concho into something distinctly their own.
The earliest documented Navajo silver conchos date to approximately the 1860s and 1870s, a period when Navajo smiths were acquiring the tools and techniques of silverworking — initially from Mexican plateros (silversmiths) and later through their own rapidly developing tradition. Early conchos were fashioned from melted American silver coins, hammered into shape over an anvil or a wooden form, then decorated using steel stamps to produce geometric and curvilinear motifs. A central slot or a copper loop soldered to the reverse allowed the disc to be threaded onto a leather strap.
Construction and Design
Traditional conchos are produced from sterling silver (92.5 per cent silver, 7.5 per cent copper alloy) or, in older examples, from coin silver of varying fineness. The principal fabrication methods are:
- Hammering and stamping: A flat sheet of silver is cut to shape — typically oval, round, or butterfly-form — then worked with a chasing hammer and a set of hand-cut steel stamps to produce repoussé relief and incised geometric patterns. Borders are frequently defined by a repeated stamp called a rocker or file design.
- Die-stamping (drop-stamping): From the late nineteenth century onward, some smiths used two-part steel dies to press repeated decorative elements into the silver surface, allowing for greater consistency across a set of matched conchos.
- Casting: Lost-wax (cire perdue) and tufa-stone casting — a technique particular to the Southwest, in which designs are carved into soft volcanic tuff and molten silver is poured into the mould — produce conchos with higher relief and a characteristically granular surface texture on the reverse.
Design vocabulary is predominantly geometric: stepped triangles, whirling log motifs, cross-hatching, scalloped edges, and radiating lines. Floral and naturalistic elements appear in later work influenced by broader American and Mexican silversmithing. The butterfly concho — an oval disc with two lateral lobes cut away to create a figure-eight or butterfly silhouette — is a particularly distinctive Navajo form that emerged in the nineteenth century and remains in production today.
The Concho Belt
The concho belt is the most celebrated application of the individual disc. A complete belt typically comprises between seven and thirteen matched conchos linked by a leather strap, with a central or terminal piece — the keeper — that may be larger or more elaborately worked than the flanking discs. In the nineteenth century, conchos were attached by threading the leather through a central slot cut in the disc; later, a separate oval or rectangular silver loop (billet) soldered to the reverse replaced the slot, a refinement that protected the leather and allowed for more elaborate surface decoration across the full face of the disc.
Concho belts served multiple functions simultaneously. As wearable silver, they represented accumulated wealth that could be pawned at trading posts — a practice central to the economic life of the Navajo Nation from the 1870s through the mid-twentieth century. As ceremonial dress, they were worn at dances, ceremonies, and important social occasions. As artistic statements, a belt demonstrated a silversmith's command of proportion, stamping consistency, and surface refinement across a matched set of pieces — a considerably more demanding technical challenge than producing a single ornament.
Turquoise and Gemstone Incorporation
Early conchos were purely silver, and the unadorned stamped disc remains a canonical form. From the late nineteenth century onward, however, Navajo and Zuni smiths began setting turquoise cabochons into conchos, a development that accelerated through the early twentieth century as trading-post demand for turquoise-set jewellery grew. Turquoise from mines in the American Southwest — including Cerrillos (New Mexico), Bisbee (Arizona), Morenci (Arizona), and the Sleeping Beauty mine (Arizona) — was the stone of choice, valued for its sky-blue to blue-green colour and its deep cultural significance in Pueblo and Navajo cosmology. Coral, shell, and occasionally other stones appear in later or more eclectic work.
Contemporary concho belts may incorporate a wide range of stones, including spiny oyster shell, lapis lazuli, and various turquoise simulants, though traditionally minded collectors and institutions continue to prize all-silver or silver-and-turquoise examples using natural, untreated stone.
Hallmarking, Attribution, and Authentication
The Indian Arts and Crafts Act of 1990 (United States federal law) prohibits the misrepresentation of non-Native-made goods as Native American handcraft, a provision directly relevant to the concho belt market, which has been subject to significant importation of machine-made imitations, primarily from Mexico and Southeast Asia. Authentic work by enrolled tribal members is typically hallmarked with the maker's personal stamp — a practice encouraged by the Navajo Nation and other tribes — and may carry a certificate of authenticity from the artist or a reputable gallery. Major auction houses, including Sotheby's and Bonhams, regularly offer documented historic and contemporary concho belts, and specialist dealers such as those affiliated with the Indian Arts and Crafts Association (IACA) provide further authentication resources.
Dating historic conchos relies on constructional evidence: the presence of a slot (earlier) versus a soldered loop (later); coin silver versus sterling; the character and wear of stamping; and provenance through trading-post pawn records, where these survive.
Cultural and Collecting Context
The concho belt occupies a position in the collecting world analogous to that of a major jewel in European contexts: it is simultaneously a work of applied art, a cultural document, and a store of intrinsic metal value. Museum collections at the Heard Museum (Phoenix), the Smithsonian's National Museum of the American Indian, and the Denver Art Museum hold important historic examples. The market for fine historic belts — particularly those attributable to named nineteenth-century smiths or to specific trading-post provenance — is robust, with exceptional examples reaching five- and six-figure sums at auction.
For the gemmologist and jewellery specialist, the concho belt is a reminder that the significance of a jewelled or metalwork object cannot be reduced to its constituent materials alone. The cultural weight, the technical tradition, and the historical moment of production are inseparable from any honest assessment of value.