Coast Diamonds

Elegant and Sylish

John Hardy

Discover John Hardy's powerful and inspiring collections
DESIGN YOUR OWN WEDDING AND ETERNITY BAND
Let our talented craftsmen breathe life into your love story by designing a luxurious, bespoke wedding or eternity band. Tailored to your budget, relationship, and individual style.

Jewelry Store In Sayville, NY.

We are a premier jewelry store in Sayville, NY.

Loose Diamond Search

All loose diamonds we sell are GIA certified and laser inscribed as well as being verified with our state of the art diamond grading equipment.

  • Round
  • Cushion
  • Princess
  • Oval
  • Marquise
  • Pear
  • Asscher
  • Emerald
  • diamond_pear
Sayville's Home for Fine Jewelry
Sayville's Home for Fine Jewelry
Ring Builder
Create Your Own Engagement Ring
Build your Ring
Sayville's Home for Fine Jewelry
Jewelry Services
Discover Expert Services
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Sayville's Home for Fine Jewelry
Special Financing
Flexible Financing Options available
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Sayville's Home for Fine Jewelry
Gold Buying
Bring it in and we'll pay cash
Sell your Gold

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Designer Collections

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