Eilat is the southernmost city of Israel, located at the head of the Gulf of Aqaba on the Red Sea, and it is also the source of the trade name Eilat stone (Hebrew: even Eilat) for a distinctive blue-green ornamental rock composed of an intergrowth of chrysocolla, malachite, turquoise, and various other secondary copper minerals, mined historically at the Timna Valley copper deposits about 25 kilometres north of the modern city. The stone has been promoted in twentieth- and twenty-first-century Israeli tourism and jewellery as the "national stone of Israel" and as the legendary King Solomon's Stone, with the Timna mines themselves identified by some traditions as the biblical mines of Solomon - although the latter identification is not historically established and is treated as legendary rather than documented.

Geological character

Eilat stone is not a single mineral species but a polymineralic assemblage formed by the secondary alteration of copper sulphide deposits in the Timna copper-bearing sandstones. The principal components include chrysocolla (hydrated copper silicate, the dominant blue-green component), malachite (basic copper carbonate, providing the deep green banding), azurite (basic copper carbonate, contributing the deeper blue), turquoise (hydrated basic copper aluminium phosphate, when conditions for its formation are met), and minor pseudomalachite, brochantite, and other secondary copper minerals. The assemblage forms in the oxidation zone of the original copper deposits, where descending meteoric water has reacted with the primary sulphides and redeposited the copper in carbonate, silicate, and phosphate phases. The result is a banded, mottled, or matrix-textured material with colours ranging from pale sky-blue through saturated turquoise to deep green, often with black or red iron-oxide veining.

The Timna Valley mining history

The Timna Valley deposits have been worked since at least the Chalcolithic period (fourth millennium BCE) for copper, with substantial Egyptian working under the New Kingdom pharaohs (particularly during the reigns of Seti I, Ramesses II, and Ramesses III, c. 1300-1150 BCE) and continued use through the Iron Age, the Edomite kingdom, the Nabataean period, and the Roman and early Islamic periods. Modern Israeli copper mining at Timna ran from 1955 to 1976, with the Mekhorot company operating the deposit at industrial scale; ornamental Eilat stone was a by-product of the copper mining and was processed locally at lapidary workshops in Eilat for the tourist trade. Modern copper mining at Timna ceased in 1976 due to economics, and the area is now operated as the Timna Valley Park, a tourism and heritage site, with limited specimen collecting permitted.

The Solomon's mine question

The popular identification of Timna with the biblical "King Solomon's mines" is a twentieth-century association that has been promoted in tourism literature but does not have firm archaeological support. The biblical references to Solomon's wealth and to copper production in his kingdom (1 Kings 7) do not specify Timna by name, and the archaeological dating of the Timna workings places the major Iron Age production in the period contemporary with the United Monarchy under David and Solomon (tenth century BCE) but does not provide direct evidence linking the workings to Solomon personally. Modern archaeological work, particularly by Beno Rothenberg's team in the 1960s and the more recent Tel Aviv University excavations under Erez Ben-Yosef, has clarified the long history of Timna copper production while leaving open the question of which specific Iron Age polities controlled the workings at any given period - the Edomites, the Israelites, or independent Negev tribal groups all being plausible candidates at different points.

The stone in jewellery

Eilat stone is cut as cabochons, beads, and ornamental tiles for use in Israeli-tradition jewellery, particularly in tourist and pilgrimage pieces sold to visitors at Eilat and Jerusalem. The material takes a moderate polish, has a hardness of approximately 4 to 6 on the Mohs scale (varying with the local mineral mixture), and is generally suitable for pendants, earrings, and ring stones with protective settings rather than for high-wear daily-use pieces. The aesthetic appeal is the variegated colour pattern, with each piece showing its own combination of blue, green, and brown components, and the stone has been incorporated into both modern Israeli design and into traditional silver-mounted forms drawing on Yemenite and Sephardic Jewish jewellery traditions. The Eilat stone is also occasionally used for the embellishment of mezuzah cases, hamsa amulets, and other Judaica.

Disclosure and the trade

The CIBJO Coloured Stone Blue Book and similar trade-nomenclature guides treat Eilat stone as an ornamental rock composed of a copper-mineral assemblage, requiring disclosure of the polymineralic nature where any specific component (chrysocolla, malachite, turquoise) might otherwise be implied. The stone is occasionally sold under names that emphasise the turquoise component, but reputable disclosure indicates the assemblage rather than any single mineral. Imitation Eilat stone made of dyed or stabilised chrysocolla, of polymer-bonded copper-mineral powders, or of plastic and resin composites is not uncommon in the lower-end tourist market, and the buyer should verify the natural assemblage where the price suggests genuine material.

Place in Israeli identity

The Eilat stone has been adopted as a symbol of Israeli national identity, in the way that turquoise is associated with the American Southwest or jadeite with China, and it is regularly cited in tourism, gift-shop, and bar mitzvah/bat mitzvah jewellery contexts as the "national stone". The designation is informal rather than official, but the cultural association is well-established, and the stone occupies a recognised niche in the Israeli jewellery and tourism economy alongside the other locally-significant materials of the region.