Ligure stands apart from the other eleven breastplate stones for a reason internal to the Hebrew text itself: leshem is a rare word whose meaning ancient translators were already unsure of by the time the Septuagint was made, and no chain of transmission has settled the question in the more than two thousand years since. Jacinth, the modern name for reddish-orange hyacinth zircon, is among the most commonly proposed identifications, alongside amber, tourmaline and opal, each with its own scholarly advocates and none commanding a clear consensus.
This atlas records ligure's identity as genuinely unknown rather than debated in the sense of two settled competing camps, because what the surviving evidence shows is a series of independent guesses made across different centuries and languages rather than an ongoing argument between two well-defined positions. A linked open question in this atlas names what kind of evidence, most plausibly a securely dated ancient Hebrew source using leshem in an unambiguous non-biblical context, would be capable of resolving it.