From left to right:

• 2.5mm round diamond, G-H color and SI clarity, on 5mm wide ring.
• 2mm genuine blue sapphire on 4mm wide ring.
• 2mm round diamond, G-H color and SI clarity, on 4mm wide ring.
• 2mm genuine black spinel on 4mm wide ring.
• 1.5mm round diamond, G-H color and SI clarity, on 3mm wide ring.