221 grams. Approximately 111 x 72 x 19 mm Lunar
TKW 3.3 kg. Fall not observed. Found 2015.
  
Steve writes:
At 3.3 kg TKW, NWA 10203 was one of the larger lunar finds of its time. It is a member of a clan that includes NWA 7834, 7948, 8306, 10149, 10172, 10203, 10272, 10253, 10258, 10263, 10291, 10317, 10376, 10546, 10599, 10644, 10782, 10810, 10989, 11109, 11185, 11249, 11563, and Galb Inal.
While I had included this lunar half-stone in an earlier MPOD on another meteorite in this clan (NWA 10272 on 8/30/2017), I thought it deserved a few more comments (plus, it gave me a chance to offer more 3D images!).
This particular half-stone weighs 221 grams and measures roughly 111 x 72 x 19 mm. To give a better indication of its size, Photo 1 shows this half-stone in its 12” x 8” Riker mount alongside several smaller lunar pieces from other falls (unlike the Riker in the aforementioned NWA 10272 post, this larger one was created later as one of three that now only feature lunar meteorites).
Photos 2 and 3 were taken at dissimilar angles to better show its brecciation and enhance differences between its various lithologies. The MetBul lists four for this polymict breccia:
unbrecciated olivine gabbro with zoned clinopyroxene
fragmental anorthositic gabbro breccia
fragmental gabbroic breccia with approximately equal proportions of plagioclase, pyroxene and olivine
shock melt veins and pools
Obviously this piece lacks the lighter lithology seen in my NWA 10272 piece (Photo 4 is a reminder of what that slice looked like).
Photo 5 shows the uncut weathered side of this meteorite. In addition, Photos 6 and 7 offer two crossed-eyes 3D views of its back side (Photos 8 and 9 provide red-cyan anaglyphs for those that struggle with crossed-eyes images, though for some reason the software I used to create them exaggerates the depth).
As an aside, I find the name "NWA 10203" numerically pleasing: the number 10203’s non-zero digits are not only sequential, but 10203 has three prime factors – 3, 19, and 179 – that are respectively 1, 2, and 3 digits long. (My daughter says I’ve "geeked out" with this last comment, but I’m sure The Big Bang Theory’s Sheldon Cooper would be impressed!)
[As Paul has pointed out in my prior posts with crossed-eyes 3D images, it’s often easier to start with the image reduced in size on your screen, then increase its size slowly while keeping the two images converged; I find that these particular red-cyan images are also better viewed when displayed smaller than full screen.
Note from the MPOD Webmaster on 3-D Viewing:
I cannot fuse the stereo-pair images as presented. They are too large for my aged eyeballs to bring together. If you have the same problem, try this:
1) Click on the picture to view the full-resolution photo.
2) Click the 'Smaller' button 10-15 times to shrink the picture to the point where you can fuse the images.
3) Hold the mouse over the 'Bigger' button, fuse the pictures, and click the mouse while keeping the images fused to see how large you can go.
More Info on 3-D Viewing
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