How to draw a simple round brilliant

Vertical and Horizontal lines

Firstly, to be able to draw accurate gemstones we need to create horizontal and vertical guidelines. To create the guidelines we need a pair of triangle rulers

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Place and hold triangle A with the vertical edge to the left as shown and make sure it is held firmly, then place triangle B opposite triangle A with the 45 degree edges facing each other.

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Draw a horizontal line using the top edge of triangle B.

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Holding triangle A slide triangle B upward and draw a vertical line to create crossed lines at exactly 90 degrees.



45 Degree Lines

To be able to draw faceted gemstones we also need to create intersecting 45 degree guidelines.

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With your triangles in the ‘home’ position (parallel to your initial lines, slide triangle B down triangle "A.

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Rotate triangle A around triangle B

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Rotate until the 45 degree edge of triangle A is sitting on the top 90 degree edge of triangle B

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Just like this

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Move triangle A so the right hand side is intersecting the cross created by your horizontal and vertical lines .

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Then draw a line.

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Slide triangle A along triangle B until the left hand side intersects with the center point - draw the second 45 degree guide line.

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Phew - that was a lot of talk about angles but job done!

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Place the round template on the center of the guides and draw a circle. For this example, lets draw a circle with a diameter of 17mm.

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To create the facets we will draw two squares within the circle.

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First let’s join each of the points where our 45 degree lines intersect with our circle as shown.

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Now lets do the same with our 90 degree lines.

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WOOP WOOP WOOP - that was a lot of effort, but you’ll be able to doodle them super fast in no time at all!

 

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