above is test model in solidwork 2017. the urdf is:

<robot
  name="Part1">
  <link
    name="Part1">
    <inertial>
      <origin
        xyz="0.01494 0.0058461 0.005"
        rpy="0 0 0" />
      <mass
        value="0.019735" />
      <inertia
        ixx="6.70660759226523E-06"
        ixy="2.43391976571625E-07"
        ixz="-4.43715000683748E-23"
        iyy="1.82003927243728E-06"
        iyz="2.68535879956309E-22"
        izz="8.19773544892975E-06" />
    </inertial>
    <visual>
      <origin
        xyz="0 0 0"
        rpy="1.5707963267949 0 0" />
      <geometry>
        <mesh
          filename="package://Part1/meshes/Part1.STL" />
      </geometry>
      <material
        name="">
        <color
          rgba="1 0.16863 0.16863 1" />
      </material>
    </visual>
    <collision>
      <origin
        xyz="0 0 0"
        rpy="1.5707963267949 0 0" />
      <geometry>
        <mesh
          filename="package://Part1/meshes/Part1.STL" />
      </geometry>
    </collision>
  </link>
</robot> 

when I launch this urdf in gazebo/rviz can't see texture its plain white.