Check out the newest designer talent in the Design Center at JCK Las Vegas, May 29–June 1.     Ring in 18k yellow gold and silver with 1.7 cts. t.w. diamonds; $8,450; Dao Fournier, Jacksonville Beach, Fla.; 912-399-4168; daofournier.com  Grid scribble earrings in oxidized sterling silver and 14k and 18k gold with diamonds; $850; Heather Guidero Jewelry, Providence, R.I.; 718-964-3011; heatherguidero.com Ring in 18k rose gold with 0.9 ct. t.w. pink diamonds; $3,500; Ralph Masri, Beirut; 961-15-66-538; ralphmasri.com Leah ring from the Galaxy collection in 14k yellow recycled gold with 5.99 ct. carnelian and 1.62 cts. t.w. diamonds; $3,750; Arya Esha, Jacksonville, Fla.; 305-812-4986; aryaesha.com Necklace in 18k gold with blue and green quartz and diamonds; $6,400; Marcia Budet, NYC; 212-929-0184; marciabudet.com