不論在臺灣或是菲律賓群島，在新石器時代的考古遺址經常可以發現綠色閃玉製的器物。由於在自然界中閃玉的礦脈極為稀少，因此對於史前閃玉製器物的溯源就必須採用化學成份分析以為辨識不同的玉料來源。為了明確定義臺灣所產的豐田閃玉之礦物特徵，本文使用了電子微探儀(electron probe micro analyzer，或簡稱EPMA)對臺灣豐田的閃玉進行化學成份分析以和生產於東亞及太平洋等其他地區的軟玉進行區辨。在本文中總計分析了17件採自花蓮豐田的玉料，從而確它們是由透閃石-陽起石所組成的角閃石礦物(鎂/鎂+鐵值低於0.93)、為纖維組織，而且其鉻鐵礦包裏體中含有指標性意義的錳元素(含量可達9 w.t%)及鋅元素(含量可達7 wt.%)。上述幾項礦物特徵都可做為區辨花漣豐體玉料與他地玉料間的差異。 同時，本文也利用電子微探儀針對菲律賓島所出土的白色玉器和綠色玉器進行分析，其中包括了9件出土於Palawan島Tabon Caves遺址群的綠色玉飾、1件出土於呂宋島北部Cagayan河谷Nagsabaran遺址的綠色玉環，以及4件採進自呂宋島南部Batangas地區的白色玉錛。本五的分析結果顯示，在菲律賓史前時代至少有兩類的玉料被廣泛的使用，其中可知綠色玉料多用於製造裝飾品，主要來自臺灣東部的豐田玉礦，至於大量出土於Batangas地區的白色玉器，主要是錛和鑿這類的日常工具，很可能是來自呂宋島的某處未知礦源。因此，本文的研究結果讓我們對於史前族群在東南亞島嶼之間的互動往來有了更屬、更確切的瞭解。

Green-colored nephritic jade artifacts are commonly found in Neolithic archaeological sites in Taiwan and some regions of the Philippines. Nephrite deposits only occur rarely in nature, and it is widely accepted that chemical analysis is required if nephritic artifacts are to be sourced to specific quarries. In order to define the mineralogical character of Fengtian nephrite in Taiwan, an electron probe micro analysis (EPMA) was carried out on nephrites from this source and others in East Asia and the Pacific region. Seventeen nephrite specimens were analysed, and found to be composed of tremolite-actinolite amphiboles (Mg/[Mg+Fe] less than 0.93) with fibrous texture, and bearing chromian-spinel inclusions with significant amounts of manganese (Mn: up to 9 wt.%) and zinc (Zn: up to 7 wt.%). These chemical character can be applied to differentiate the Fengtian nephrite from others. An EPMA sourcing study was also applied to a series of green-and white-colored nephritic artifacts excavated from the Philippines. These included nine green nephritic ornaments from the Tabon Caves on Palawan Island, a fragment of a green nephritic bracelet from the Nagsabaran site in the Cagayan Valley, northern Luzon, and four white nephritic adzes from batangas, south-western Luzon. The results indicate that there are at least two kinds of nephrite raw material that were used in the Philippine. The green nephrite, used mostly for the ornaments, was derived from the Fengtian deposits in eastern Taiwan. The white nephrite found in many Batangas sites, not of high quality, was only used for tools such as adzes and chisels and may have been acquired from a local Luzon source. Consequently, this study provides some important evidence about interaction between different prehistoric populations across a large area of Island Southeast Asia.