14K Smoky Quartz & Diamond Slide. 16.5mm(5/8 inch) Wide by 12mm(1/2 inch) Long. 1-8x4mm Marquise Smoky Quartz and 2-1.3mm Diamond.. 14K Smoky Quartz & Diamond Slide. 16.5mm(5/8 inch) Wide by 12mm(1/2 inch) Long. 1-8x4mm Marquise Smoky Quartz and 2-1.3mm Diamond.Fine styling and finish from our Classic Slide Collection - Fine gems set in 14K gold with solid back. Hand made and finished. Add this to your slide bracelet. Made in the USA.