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和田玉籽料细腻润泽,产量较少,在玉石界十分抢手,近年来价格迅猛上涨。玉器市场中籽料仿制品比比皆是,真假难辨。因此有必要揭露其作假手法,提高鉴赏能力。1和田玉籽料的特征根据产出环境和成因类型和田玉分为山料、山流水和籽料。棱角分明、无磨圆、无皮壳的山料,经过风化和搬运作用,滚落于河流之中;在河流中经长期的冲刷和磨蚀,最终形成籽料。籽料的特点是浑圆状、卵石状,磨圆度好;表皮颜色多样,以红褐色为主,可见秋梨皮、虎皮和枣红皮等色。与籽料相比,山流水多为次棱角状,磨圆度差,有薄的皮壳。 相似文献
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近年来随着和田玉石籽料价格不断增长,大量的皮色染色的和田玉籽料也充斥着市场。本文通过对比和田玉籽料原料皮色及人工皮色的颜色、成因、颜色分布等,对和田玉籽玉原料皮色染色进行了鉴别探讨。 相似文献
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本文拟通过和田玉玉器在史前三大玉板块、文明时代各个王朝玉文化所处的帝王玉的中流砥柱般的强力地位及其诸多侧面,论述其玉、玉文化独有的德、符优势及其光辉的艺术典范. 相似文献
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和田玉(透闪石玉)的研究 总被引:12,自引:0,他引:12
用电子探针、X射线衍射、扫描电镜等测试方法,对新疆和田玉进行了研究,结果表明和田玉的主要矿物组成为透闪石,主要结构为毛毡状结构.本文还论述了其成因,指出了进一步找矿及考古意义. 相似文献
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中国和田玉的开发利用历史悠久,在中国古玉器中地位显著.从新石器时代晚期开始到清代,和田玉一直是中国古玉器的主要玉材;而和田玉又具有其他产地软玉无法比拟的颜色,具有独特的羊脂白色;用和田玉制成的玉器,是中国传统玉文化的主要载体,具有不可复制的惟一性. 相似文献
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DIRK GOOSSENS 《Sedimentology》1995,42(3):391-402
The effect of rock fragments and rock fragment cover on the accumulation of airborne dust was examined in a long-term field experiment in the Negev desert of Israel. Four parameters were studied: pebble eccentricity, pebble size, pebble flattening and cover density. The effect of these parameters on the accumulation of dust on the pebbles, on the accumulation of dust between and underneath the pebbles, and on total dust accumulation (pebbles+interpebble space) was measured separately. Accumulation on the pebbles increased as the pebbles became larger, less flattened and more elongated, and as cover density increased. Accumulation between and underneath the pebbles increased as the pebbles became smaller, more flattened and more elongated, and as cover density increased (although the accumulation area available became smaller). Total dust accumulation increased as the pebbles became smaller, more flattened and more elongated, and as cover density increased. Rock fragments act as a dust trap as dust accumulation on pebble-covered surfaces is several tens of times larger than dust accumulation on similar but pebble-free surfaces. However, less than 20% of the initially settled dust is protected from further erosion. In the Negev desert, dust erosion by wind is of the order of 10 times larger than dust erosion by water. The rate of long-term dust accumulation in the Negev is of the order of 15–30 g.m?2.yr?1. This is considerably lower than the rates proposed elsewhere in the literature, which are based upon over optimistic dust retainment percentages. 相似文献