
Drawing a vector diamond is pretty simple in Adobe Illustrator. First, let’s do some research on the anatomy of a diamond.
We don’t want to do some fancy cut and get rejected by our clients.
Here’s a proportional diamond line art taken from the website. We will
use this as a guide to help us create a perfect diamond in this
Illustrator tutorial.
1. Create a template guide
First, place the line work by going File>Place and select the
graphic. Go to Layers Palette and click the arrow to show the menu and
select Template. This will lock and make the graphic transparent for
easy tracing.
2. Placing a guide in the center
Turn on your Rulers by pressing Ctrl/Command+R. Drag a guide and place it in the center.

Next turn on the Snap to Grid by pressing Shift+Ctrl+”/Shift+Command+”
or go Window>Snap to Grid. You will see the grid appear at the
background.
3. Tracing the artwork
Create a new layer in your Layer Palette (new layer icon at the
bottom of the palette). Using the Pen Tool, start to trace each facet.
The points will snap to the grid. Make sure to close each shape and make
the points meet in the same spot. Do this until we complete the right
half of the diamond. We can turn off Snap to Grid and manually adjust
the points to fix the curves which doesn’t snap to the grid very well.
4. Reflecting the diamond
Select the whole half of the diamond. Select Reflect Tool and
Alt/Option+click on the center guide line. This will pop up a menu.
Select Vertical for Axis and click Copy.

Let’s start combining the center facet. Select both the facets at the
bottom and hold Alt/Option+Click and click Add to shape area from
Pathfinder (Window>Pathfinder). Repeat this step for the top facets
too.
5. Fill the diamond
Select one of the facet and fill it with Linear Gradient. Create a
3rd point in the gradient by clicking in between the 2 points once and
make it black. Also turn off the stroke for the facet.

Select the rest of the facets and using the Eye Dropper Tool, click
once on the facet we just filled with linear gradient. This will fill
the rest with gradient.

Looks pretty ugly now, so let’s fix that. Select the Gradient Tool and
click and drag in different directions for each facet. Do this until you
get something below.

I find the black white gradient looks a bit too harsh. Let’s fix that
by selecting all the facets and open both your Gradient and Color
Palette. Click once at the middle black point in the Gradient Palette.
The Color Palette will show the black color. Change it to a darker blue.
This will make the diamond appear cooler. Better now, right?
6. Drawing the girdle
You realise I haven’t draw the girdle( new word I learnt from my
research). Select the Rectangle Tool and draw a rectangle that meets all
the four points of the girdle’s edges. With the Pen Tool, go near the
selected rectangle and click once at the middle of the top line. This
will add a new point. Click the Keyword Arrow Key and shift the point
upwards. Do this for the bottom too. Once done, Right+Click and select
Arrange>Send to Back. This will cover the missing girdle.

7. Finishing Touch
How can a diamond do without it’s shining glow and sparkling
starburst? So let’s begin to draw a circle and fill it with Radial
Gradient from white to black and send it to the back of the diamond.

Select the Star Tool and drag a star on the canvas. Without releasing
the mouse, press Arrow Up key to add additional points. Hold
Ctrl/Command and drag to increase the radius. Try to get a starburst as
shown below.

Here’s the final illustration and hope you enjoy cutting your own
diamond. If you like my diamond, pls remember to “grade” my 10-carat
diamond.
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