Fig. 2
From: Characterizing ancient jade by on-site analysis in Sanxingdui, China
On-site non-destructive analysis and soil sample collection at pit K8 (A the archaeological context of the four jade artefacts and the operating condition for on-site testing; B Soil sampling around zhang forked blade; C Soil sampling around guan tubular bead; D Raman analysis of zao chisel)
