Tribes of Israel is pre-cut and scrappy friendly!
I suggest using solids or tone-on-tone prints to achieve the gemstone look. At minimum you will need a dark, medium and light color per gem. Fat quarters or 10" square pre-cuts work great but don't forget to raid your scrap bins! I chose to use Connecting Threads Color Wheel Solids Complete Set, 10" square pre-cuts.
Here's the colors & gems they represent:
Emerald: Hunter Green
Topaz: Light blues to light turquoise
Agate: variety of colors (solid scraps are perfect)
Onyx: Black to gray
Jasper: Iron Red (Red-Brown)
Beryl: Muted Green, Blue and Gray (just one of each)
Diamond: White to off white (try to avoid gray tones)
Yardage for the borders and backing:
Gold: 1 Yard
(muted yellow, light tan or mustard will work)
Black: 1 Yard
For a horizontal seam: 2 1/2 Yards
For a vertical seam: 1 1/2 Yards