An innovative approach based on the combination of spectroscopy and traceology was used in order to analyse iron ore mirrors excavated at the Sojo site (Chibcha area, present-day Costa Rica) in the northern Pacific region of Costa Rica (AD 300 to AD 500–600). Such mirrors were prestigious artefacts related to power, shamanism and divination during the Classic Period in the Maya area. Stone bases, adhesives and tesserae were characterised using FT-IR, SEM/EDX and Raman Spectroscopy, as well as X-Ray Fluorescence (XRF) and the techniques used in their manufacture were elucidated using traceology. Similar materials were found to have been used for all the bases, tesserae, adhesives and coatings of the different mirrors. Furthermore, two tessera-shaped fragments were most probably part of a composite mirror, manufactured by sticking hematite nodules onto stone tesserae using a clay mixed with an organic binder. Chert and obsidian tools were used to make, respectively, perforations and edges on all mirror bases, and the two main types of abrasion of the base surfaces were found to have been made with basalt or limestone. These analyses indicate a probable Maya origin as their manufacturing traces distinguish them from Teotihuacan mirrors.

为了分析在哥斯达黎加北太平洋地区（公元300年至公元500年间，在哥斯达黎加的Sojo工地（今天的哥斯达黎加，Chibcha地区）发掘的铁矿镜），使用了一种结合光谱学和跟踪学的创新方法。 600）。这些镜子是玛雅地区经典时期与力量，萨满教和占卜有关的著名文物。使用FT-IR，SEM / EDX和拉曼光谱以及X射线荧光（XRF）对石材，粘合剂和镶嵌物进行了表征，并使用示踪技术阐明了其制造中使用的技术。发现相似的材料已用于不同镜子的所有基底，镶嵌，粘合剂和涂层。此外，两个tessera形碎片很可能是复合镜的一部分，通过使用与有机粘合剂混合的粘土将赤铁矿结节粘贴到石镶嵌上来制造。用Chert和黑曜石工具分别在所有镜面基座上打孔和边缘，发现基底表面的两种主要磨损类型是玄武岩或石灰石。这些分析表明可能是玛雅人的起源，因为它们的制造痕迹将它们与特奥蒂瓦坎镜子区分开了。