They are around 1.5mm to 2mm deep - blue lace agate is a natural material, so there are variations in the appearance of each bead.
Quality Delicate Nottingham Lace Trim 2.25"/5.5cm CHOOSE COLOUR AND LENGTH
Blue Lace Agate Round Beads - 4mm 6mm 8mm 10mm, 14" Strand, for Jewellery Makin
Blue Lace Agate Round FACETED Beads - 4mm 6mm 8mm 10mm - 14"for Jewellery Making
Agate Crystal Stone - Natural Mineral Ore, Decorative Rock Fillers, Blue Lace Gem Gravel | Aesthetic Landscaping Accent, Calming Display Element For Aquarium Bonsai Vase Planter Interior Decor
Blue Lace Agate Gemstone Bead Chips - Natural Crystals - 5mm ~ 8mm - 1 Strand
Flat Braided Leather Cord 7mm 5m Sky Blue Craft Strip for Jewelry 16.4ft