標 本 名: | ぺリドット ( 鉄かんらん石 - 苦土かんらん石) ドゥニライト (Fayalite-Forsterite Series, Variety: Dunilite)
| 化学組成: | (Mg1.53Fe0.48Mn0.01)[Si0.99O4 ] | サ イ ズ: | | 重量: | | 透明: | | 数量: | | 産地: | near Katukubura, Kollane, Embilipitiya (Embilipitya; Ambilipitiya), Province of Sabaragamuwa, スリランカ (Sri Lanka) | This is a flat but well preserved dunilite crystal. Except of two small faces, the whole crystal is terminated and shows partly transparency. This peridot variety has been discovered only a few years ago and belongs to the olivine mineral group, it was named after Dunil Palitha Gunasekara. The difference is defined by the fact that it contains traces of manganese.
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