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| Light House - designed by Jeff R. Graham jeff@faceters.com ©2000 | |
|---|---|
| Angles for R.I. = 1.54 | 22 facets + 4 facets on girdle = 26 |
| 2-fold, mirror-image symmetry | 96 index |
|
L/W = 1.000 P/W = 0.307 C/W = 0.170 |
H/W = (P+C)/W+0.02 = 0.498 P/H = 0.618 C/H = 0.342 |
| Vol./W^3 = 0.098 | Brightness at 0 degrees tilt for R.I. = 1.54 85.2% Light Return |
| Pavilion | |||
|---|---|---|---|
| P1 | 41.00 |
12-36-60-84 |
Cut to center point. |
| P2(G) | 90.00 | 12-36-60-84 | Cut a level girdle, meet P1. |
| Crown | |||
|---|---|---|---|
| C1 | 42.00 |
12-36-60-84 |
Cut to meet girdle. |
| C2 | 28.00 | 14-34-62-82 | Cut to meet girdle. |
| C3 | 24.00 | 16-32-64-80 | Cut to meet girdle. |
| C4 | 24.00 | 96-48 | Cut to meet girdle. |
| C5 | 18.08 | 96-48 | Cut to meet C1,C2. |
| C6 | 12.55 | 96-48 | Cut to meet C2,C3. |
Light House - Cutting Remarks
Shown at left is a 8mm ~ 1.45 carat Light House cut from Maraba Amethyst by Jeff Graham. Here is a “Money Cut” that is fast and easy with great performance, which is what they are all about. This works very well and is ideal for everybody, including someone who is new to cutting. As the stone gets large (over 8mm), especially in lighter colored material, I recommend that a table be cut in to eliminate the typical "eye" that an apex crown leaves. A lot of people asked me for this design when I first posted a picture of the Amethyst on my website. To tell the truth I was planning to publish this design in my next "Money Cuts" addition. But... Seeing as that is some time away and I have people wanting to cut it, this design seems like a good one for a Christmas present (posted December 21, 2000) to my customers and friends...
A table should be cut in on larger stones. This design works in Quartz, Tourmaline, Topaz, Garnet, Sapphire, and man-made materials. I use this for earring stones quite a bit.
Enjoy cutting your "Light House"... Drop me an email to let me know your results and what you've cut, or feel free to inquire if you have any questions or need some help regarding this design.
Random - Cosine - ISO
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