Name Also Known As Variations Distribution Complete Description  Complete Pictures Added Waccamaw Orthoquartzite           Wacissa Chert           Waddell Beach Chert           Wagner Hill (Fine Grain) Basalt           Wakefield Felsite           Walden Creek Argillite           Walker Chert           Wallkill Chert           Walsh Creek Rhyolite           Walton Chert           Wamsutta Rhyolite           Wanapum Basalt           Wapanucka Chert           Wapsipsicon Chert           Warner Chert           Warrenburg Sandstone           Warsaw Chalcedonic Chert Croton Chalcedonic Chert         Wasatch Mudstone           Wasco Agate           Wascoite Chert           Wascoite Jasper           Wash Creek Slate           Washademoak Lake Chert           Washington County Chert / Chalcedony           Washington County Jasper           Washington Gneiss           Washington Pass Carnelian           Wasrsaw Chert           Wassataquoik Chert           Wassonville Chert           Wassonville Type A - Fossiliferous Chert           Wassonville Type B - Mottled Chert           Watchung Basalt           Watchung Carnelian           Waterloo Quartzite           Waterville Gray Sandstone Great Pond Red Sandstone         Wausaw Chert           Waverly Gneiss           Waxahatchee Slate           Wayne County Chert           Wayne Gabbro           Weathering Amber Chalcedony           Weaver Rhyolite           Webers Falls Siltstone Arkansas Argillite         Weeping Water Chert           Weisner Mudstone           West Athens Hill Chert           West Bangor Slate           West Flamborough Chert           West Forks Welded Tuff Enchanted Stream Welded Tuff         West Franklin Chert           West Horse Chert           West Patrica Chert           West Texas Wood           Westerville Chert           Weverton Quartzite           Wewe Slate           Whatley Mill Gneiss           Wheeler County Chert           Whiskey Dick Wood           Whiskey Quartzite           Whiskey Wood           Whispering Pines Ranch Wood           White and Clear Agate           White Buffalo Turquoise           White Creek Turquoise           White Horse Turquoise           White Owl Turquoise           White River Chert           White River Group Plate Chalcedony           White Rocks Quartzite           White Stallion Turquoise           Whitehall Chert / Dolomite           Whitewood Chert           Wiggins Fork Wood           Wike Chert           Wiki Peak Obsidian           Wilcox Chert           Wild Horse Jasper           Wildwood Opalized Jasper           Williamson Chert / Chalcedony           Willis Chert           Williston Chert           Willow Creek Jasper           Wilson Ridge Mudstone           Wind River Forest Wood           Windermere Chert / Dolomite           Windermere Quartzite           Windy Hill Siltstone           Windy Ridge Turquoise           Winnipeg Siltstone           Winter Hills Quartzite           Winterset Chert Fusulinid Chert         Wissahickon Quartzite           Withlacoochee Agatized Coral           Wolf Den Mountain Rhyolite           Wolverine Quartzite           Woodbine Siltstone           Woodford Chert           Woodruff Wood           Woods Hole Argillite           Woodward Chert           Woodway Chert           Woodworthia Wood           Woolwich Gneiss           Worm Creek Quartzite           Wrangell Obsidian Wrangell Mountain Obsidian and Group A Obsidian         Wreford Chert (Type A, B, and C)           Wrenford Chert           Wyandotte Chert Wyandotte Cave Chert, Indiana Hornstone, Harrison County Chert         Wyman Lake Quartzite           Wyoming Jade (nephrite)