private void DrawMarble(SKCanvas canvas, SKRect thisRect) // start with the marble piece.
{
var br_Fill = MiscHelpers.GetCenterGradientPaint(SKColors.White, MainColor.ToSKColor(), new SKPoint(thisRect.Left + (thisRect.Width / 2), thisRect.Top + (thisRect.Height / 2)), thisRect.Height / 2);
SKPath gp = new SKPath();
gp.AddOval(thisRect);
SKColor firstColor;
SKColor secondColor;
firstColor = new SKColor(255, 255, 255, 50); // 60 instead of 100 seems to do the trick
secondColor = new SKColor(0, 0, 0, 50);
var br_Shade = MiscHelpers.GetLinearGradientPaint(firstColor, secondColor, thisRect, MiscHelpers.EnumLinearGradientPercent.Angle45);
canvas.DrawPath(gp, br_Fill);
canvas.DrawPath(gp, br_Shade);
}