“That gems the starry girdle of the year.”

By Still Waters (1906)

Theodric : A Domestic Tale; and Other Poems (1825), To the Rainbow
Context: p>How glorious is thy girdle cast
O'er mountain, tower, and town,
Or mirror'd in the ocean vast,
A thousand fathoms down! As fresh in yon horizon dark,
As young thy beauties seem,
As when the eagle from the ark
First sported in thy beam.For, faithful to its sacred page,
Heaven still rebuilds thy span,
Nor lets the type grow pale with age
That first spoke peace to man.</p

Literary Journals.
Curiosities of Literature (1791–1834)

Isaac D'Israeli, The Curiosities of Literature, "Literary Journals".
Misattributed, Isaac D'Israeli

Book III, line 522
De Arte Poetica (1527)

Leaves Of Morya's Garden (1924 - 1925), Book I : The Call (1924)
Context: By holiness in life, guard the precious Gem of Gems.
Aum Tat Sat Aum!
I am thou, thou art I — parts of the Divine Self.
My Warriors! Life thunders — be watchful.
Danger! The soul hearkens to its warning!
The world is in turmoil — strive for salvation.
I invoke blessings unto you.
Salvation will be yours!
Life nourishes the soul.
Strive for the life glorified,
and for the realization of purity.
Put aside all prejudices — think freely.
Be not downcast but full of hope.
Flee not from life, but walk the path of salvation.

My Grandmother's Love Letters (l. 1-4). In The Norton Anthology of Modern Poetry, by Richard Ellmann and Robert O'Clair (1988)

The Poet's Poetic Responsibility (2012)