Nouns ending in a consonant followed by -y change the -y to -ies in the plural form.
Ruby is regular. It follows the -ies Conversion rule.
Use plural verbs: "The rubies are ready" (not "is ready").
Yes. The plural rubies is standard across all English variants.
The word ruby follows the standard English pluralization rule. When forming the plural, ruby becomes rubies. This follows the -ies Conversion pattern, which is one of the most common plural rules in English.
Understanding why ruby becomes rubies helps with spelling and pronunciation. Nouns ending in a consonant followed by -y change the -y to -ies in the plural form.
When using rubies in writing, remember that it functions as a plural noun in sentences. It pairs with plural verbs and pronouns. For example: "The rubies are ready" (not "is ready"). This subject-verb agreement is essential for grammatical correctness.