Diamond laser marking is the mainstream diamond marking technology.

钻石激光刻字技术是钻石标记的主流技术。

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The monarchs' lunch, with a menu that included English asparagus, lamb from Windsor and strawberries from Kent, is part of celebrations of the Queen's Diamond Jubilee, marking her 60 years on the throne.

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Her Majesty is marking her Diamond Jubilee this year.

BBC: Salmond leads Holyrood Diamond Jubilee tributes

Rarely seen documents chronicling the life and reign of Queen Victoria have been made public on a new website marking this year's Diamond Jubilee.

BBC: Queen Victoria archive goes online