Bilingual edition: English is preserved and Chinese follows each unit. Terminology uses the confirmed v20260916 glossary; automated semantic review remains traceable.
中英双语版：英文原文完整保留，中文紧随对应单元；术语采用 v20260916 确认表，自动语义审校结果可追溯。

Labradorite

拉布拉多石

Labradorite is a silicate of composition (Ca,Na)(Si,Al)4O8. These samples are on display at the Smithsonian Museum of Natural History. The sample above left is about 10x10 cm and above right is about 4x10 cm. They are displayed under ultraviolet light to show their fluorescence. These samples and the one at right below are from Nain, Newfoundland, Canada.

拉伯拉多石是一种化学式为(Ca,Na)(Si,Al)₄O₈的硅酸盐。这些样品陈列在史密森尼自然历史博物馆。左上角的样品大约是10×10厘米，右上角的样品大约是4×10厘米。它们在紫外线下展示以显示其荧光。这些样品和右下角的样品均来自加拿大新不伦瑞克省纳因。

This sample of labradorite is from Nain, Newfoundland, Canada and is about 12 cm across.

这块拉布拉多石采自加拿大新不伦瑞克省纳因，尺寸约为12厘米。
This labradorite specimen is about 10 x 20 cm and is from Newfoundland.
这块石英标本大约是10厘米乘20厘米，来自新不伦瑞克省。

This labradorite gem is labeled as 258.2 carats. It is on the order of 5 cm across. It is from La mina de la Piedra del Dol Dorado, Chihuahua, Mexico.

这块拉布拉多石宝石被标注为258.2克拉。其直径约为5厘米。它来自墨西哥恰霍帕州的Dol Dorado矿石。

This laboradorite sample is labeled as variety spectrolite. It is about 8x7 cm and is from Ylijarvi, Karelia, Finland.

这块劳拉德石样品被标记为谱罗石变种。其尺寸约为8x7厘米，产自芬兰卡累利亚的Ylijarvi。

The carved figure at left is labeled 810.7 carats. It is from Labrador, Newfoundland, Canada.

左图中的雕刻人物标注为810.7克拉。它来自加拿大新不伦瑞克省拉布拉多地区。
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