Franz Rosenzweig

There's a photo of Franz Rosenzweig ((1886–1929) cut in the shape of the Star of David on the cover of his book The Star of Redemption (ISBN 0-299-20720-X).
There's another on the cover of the first edition of this book published on 1921 (in German).
In this book Franz Rosenzweig builds his philosophy around the shape of the Star of David, composed of two conceptual triangles which together form the basis of Jewish belief: Creation, Revelation, and Redemption; God, Israel, and World.

The Shape of the Star

This is a partial list of potential possible designs of the Star of David (not including materials and colors):

1. Superimposing two triangles
2. Superimposing two triangles so that their lines are interwoven
3. Three superimposed congruent parallelograms or rhombuses
4. A regular hexagon with six equilateral triangles upon each of its edges
5. Three “butterflies”
6. “paper hat” mirrored along a horizontal axis
7. Six Alpha letters (Hexalpha) or six A letters
8. Made from 3 W's
9. Star of David leaning on "two legs" (two triangles instead of one)
10. Star of David made from curved lines instead of straight lines

 See : Black, Max (1979). More about metaphor. In: Andrew Ortony (ed.), Metaphor and thought. Cambridge: Cambridge University Press, 19-43.

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Also:

Double Lined

Drawn by hand

Drawn by pair of compasses

Embossed

Empty or full (circumference only)

Engraved

In a circle

In a hexagon

In a lattice

In a square

In two intertwined squares

Made from dots

Made from letters (micrography)

On a round object

Partial Star of David (made from unconnected triangles)

Surrounded by inscriptions

Surrounding a circle

Surrounding a flower

Surrounding a lily

Surrounding a pentagram

Surrounding a picture (like Theodor Herzl)

Three dimensional (like Yevu Yashir's design)

With a dot (like in alchemy)

With inscription inside (like Zion)

What I learned from this partial list is:

That there is no uniform shape that everybody has to obey (like in the flag).

That there is no limit to the designers' imagination…

"O my dove..."

Four sparrows found shelter in a Shield of David built into the wall of an old building in Harrisburg Pennsylvania. Now I understand why it is called a shield.

O my dove, that art in the clefts of the rock, in the covert of the cliff, let me see thy countenance, let me hear thy voice; for sweet is thy voice, and thy countenance is comely

(Song of Songs 2:14)
This unbelievable Photo is courtesy of Kawkawpa from Flickr

Opalit

For my birthday I got this original Opalit stone with a silver Star of David. I added a string and started wearing it in order to remind me of my blog

Mosaic

There is an interesting connection between Mosaics and Stars of David. Why? I'm just asking the question and waiting for a learned answer. Here are some examples I stumbled upon recently:
Artist Akiva K. Segan presents on his web page some slides of the phases of his Star of David project. He constructed two wooden frames to separate the drawing and the mosaic. He documented the project on film.
Making Stars of David from mosaics was common thousands of years ago: in Ein Yael in southern Jerusalem; in St. Euthymius (Khan el Akhmar in Mishor Adummim, east of Jerusalem); Construction workers found in Ramle, near Tel Aviv, Israel, a Moslem six-pointed star embedded into a mosaic floor from the 8th century CE.
Marc Chagall designed in the Israeli parliament building a floor of mosaics. One of the main subjects described in it is the Star of David.
Aviva Beigel made a Star of David mosaic, sand on wood, titled Present Situation. It expresses what she feels towards the current state of affairs in Israel.
Even Zeev Golan is selling on the BiblicalGallery neckwear with a Star of David mosaic pattern.

Destroyed Settlements

After Israel finished evacuating all Jewish settlements in Gaza, in August 2005, Aharon Shevo, artist and illustrator, designed a torn Star of David with the inscription of the names of 21 settlements that were destroyed. On the background of that star there's a picture of the Titus gate in order to associate the traumatic experience of leaving the settlements with the going of Jews into exile 2000 years ago.

Captivating Light

Photo courtesy of Lisa Carmichael from Pbase who wrote to me:

The star is actually a window in the sanctuary of a synagogue in Los Angeles. They are a client of mine, and one day while I was waiting for meeting to begin I wandered around with my camera, looking for things to shoot. The light coming through the colored paines of glass was captivating - really beautiful. I am Christian, and really appreciate any heartfelt expression of one's faith, which is what this Star of David represented to me.