Possible misspelling? More dictionaries have definitions for
boron
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buying one rich Jewel or Necklace
When she would go abroad, she had her Coaches Rich and Gay, and her Livery ready to attend her in all the Splendour imaginable; and he was always buying one rich Jewel, or Necklace, or some great Rarity or other, that might please her; so that there was nothing her Soul could desire, which it had not, except 310 the Assurance of Eternal Happiness, which she labour’d incessantly to gain. — from The Works of Aphra Behn, Volume V by Aphra Behn
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