They are visible in the pictures. I don't think I've ever encountered a flamed Koa top of this size in my career. If you have a steady hand you may be able to split into 2 tops at 1/8" or 3/16" but I do not have enough confidence to try it! Length = 26.5" (short side) - 29" (longer side).
Compared to many koa wood listings online, this is an incredible value for surface area. Some pictures have been wet with alcohol to pop the grain.
Potential applications include: veneer, cabinetry, furniture, crafts, scroll saw wood, thin wood, project packs, tables, ukulele sides, ukulele backs, acoustic guitar sides, acoustic guitar backs, lamellas, electric guitar tops, dulcimers, banjos, musical instruments, canoe wood, gun grips, skateboard skins, snowboard skins, knife handle grips, engineered wood products, wear layers, bending strips, wood lamination, single piece tops, specialty wood parts, inlays, bending wood, glue ups, 1 piece tops, curved wood parts. Hawaiian Koa is one of the most treasured species among designers, architects, luthiers, homeowners, guitar builders, woodworkers and consumers. However, it is not an endangered wood.
Koa is known for it rich warm gold/red/brown colors, incandescent grain, contrasting ribbon streaks of colors within its growth rings and stunning figure. It has a unique chatoyancy. Generally speaking, Koa machines and sands well.It looks magnificent with an oil finish. Located in our Southern California warehouse. Please message me with any questions. The item "INSANELY RARE 1/2 x 20 x 28 Heavy Flamed Hawaiian KOA 1pc Explorer top" is in sale since Wednesday, January 1, 2020. This item is in the category "Musical Instruments & Gear\Guitars & Basses\Guitar Builder/Luthier Supply". The seller is "cfp_woodoutlet" and is located in Upland, California. This item can be shipped to United States, Canada, United Kingdom, Denmark, Romania, Slovakia, Bulgaria, Czech republic, Finland, Hungary, Latvia, Lithuania, Malta, Estonia, Australia, Greece, Portugal, Cyprus, Slovenia, Japan, China, Sweden, South Korea, Indonesia, Taiwan, Thailand, Belgium, France, Hong Kong, Ireland, Netherlands, Poland, Spain, Italy, Germany, Austria, Bahamas, Israel, Mexico, New Zealand, Singapore, Switzerland, Norway, Saudi arabia, United arab emirates, Qatar, Kuwait, Bahrain, Croatia, Malaysia, Brazil, Chile, Costa rica, Panama, Trinidad and tobago, Guatemala, Honduras, Jamaica, Bangladesh, Brunei darussalam, Bolivia, Ecuador, Egypt, French guiana, Guernsey, Gibraltar, Guadeloupe, Iceland, Jersey, Jordan, Cambodia, Liechtenstein, Luxembourg, Monaco, Macao, Martinique, Nicaragua, Peru, Pakistan, Paraguay, Viet nam, Uruguay.