Custom Mesh Hex Texturing

private void createTop(Float startX, Float startZ, Float startHeight, Float size) {
        Mesh mesh = new Mesh();

        Float half = size / 2;

        Vector3f[] vertices = new Vector3f[7];
        vertices[0] = new Vector3f(startX, startHeight, startZ);
        vertices[1] = new Vector3f(vertices[0].x - size, startHeight, vertices[0].z);
        vertices[2] = new Vector3f(vertices[1].x + half, startHeight, vertices[0].z - size);
        vertices[3] = new Vector3f(vertices[2].x + size, startHeight, vertices[2].z);
        vertices[4] = new Vector3f(vertices[3].x + half, startHeight, vertices[3].z + size);
        vertices[5] = new Vector3f(vertices[4].x - half, startHeight, vertices[4].z + size);
        vertices[6] = new Vector3f(vertices[5].x - size, startHeight, vertices[5].z);

        int[] indexes = {
            0,1,2, 2,3,0, 0,3,4, 4,5,0, 0,5,6, 6,1,0, // bottom
            0,1,6, 6,5,0, 0,5,4, 4,3,0, 0,3,2, 2,1,0 // reverse bottom
        };

        float[] normals = new float[21];
        normals = new float[] {
            0,1,0, 0,1,0, 0,1,0, 0,1,0, 0,1,0, 0,1,0, 0,1,0
        };

        Vector2f[] texCoord = new Vector2f[4];
        texCoord[0] = new Vector2f(0, 0);
        texCoord[1] = new Vector2f(0, 1);
        texCoord[2] = new Vector2f(1, 0);
        texCoord[3] = new Vector2f(1, 1);

        mesh.setBuffer(Type.Normal, 3, BufferUtils.createFloatBuffer(normals));
        mesh.setBuffer(Type.Position, 3, BufferUtils.createFloatBuffer(vertices));
        mesh.setBuffer(Type.TexCoord, 2, BufferUtils.createFloatBuffer(texCoord));
        mesh.setBuffer(Type.Index, 3, BufferUtils.createIntBuffer(indexes));
        mesh.updateBound();

        Material mat = new Material(app.getAssetManager(), "Common/MatDefs/Light/Lighting.j3md");
        mat.setTexture("DiffuseMap", app.getAssetManager().loadTexture("Textures/Pond.jpg"));

        Geometry geo = new Geometry("MyMesh", mesh);
        geo.setMaterial(mat);
        geo.setShadowMode(ShadowMode.Cast);

        app.getRootNode().attachChild(geo);
    }