Onyx Coffee Lab Onyx Coffee Lab Search | Advanced Search | New Members | Coupons and Discounts | All Categories Shopping & Specialty Retail >> Restaurants & Coffee Shops Onyx Coffee Lab 100 East EmmaSpringdale, AR 72764 | map | directions (479) 334-7613 Visit Site Connect With Us Member Since: 2026 If your business isn't here, contact us today to get listed!