Simple enantiomer in powder form?
Enantiomorphs are non-superposable mirror images (all signs of one coordinate axis reversed).  What is the maximum enantiomeric divergence possible?  If you have a  quantitatively negligible chiral divergence, there is nearly no quantitative difference to be realized in calculation or measurement.  BTW, the maximum energy difference between enantiomers cannot be more than a part-per-trillion difference/average.  If it were larger, there would be easily detectable enthalpy of fusion anomalies for calorimetry secondary standard benzil.

Chirality is geometry.  Geometric chirality is easily observed (no ${S_n}$ symmetries[A]) and easily calculated[B].  alpha-Quartz and gamma-glycine single crystals have $\text{CHI} = 1 \text{, COR} = 1 \text{, DSI} = 0$, maximum mathematical chirality[C], but it cannot be measured.  Solution optical rotations ignore atomic mass distribution[D].  Silver thiogallate, $\ce{AgGaS2}$ in achiral space group ${I}$-${42d}$, rotates 522°/mm along [100] at 497.4 nm[E].  ${P3_121}$ quartz and ${P3_221}$ berlinite are both  levorotatory[F].  Achiral $\ce{PhCOCH3}$ impurity changes resolved $\ce{PhCH(OH)CH3}$ optical rotation[G].  CIP notation flips with composition at constant geometry (look at natural protein cysteine versus alanine, both L-amino acids but opposite CIP notations).

How do you obtain $100\%$ optically pure maximally divergent enantiomers to your specs?  No problem!  Benzil, $\ce{(C6H5CO)2}$, is achiral when molten, gas phase, or dissolved. Solid state crystal lattice forces twist and stack benzil molecules into homochiral helices, space groups ${P3_121}$ (right-handed)or ${P3_221}$ (left-handed)[H].  



You obtain (racemic) benzil, modestly resolved (1 $\mathrm{S}$)-(-)-alpha pinene and (1 $\mathrm{R}$)-(+)-alpha pinene (both enantiomers), and mixed xylenes.  $20$ ml scintillation vial, foil-lined cap.  $100$ mg of benzil or so, $10$ ml resolved, alpha-pinene, heat to $100$ C. Drip in mixed xylenes until the molten benzil is just soluble, add another drop or two, very slowly cool undisturbed.  Only one space group crystallizes out.

Enantiomorphic space groups[I] are mathematically perfectly divergent geometric chiralities.  Here is the calculation of benzil crystal lattice's atomic mass distribution from Petitjean's software, CHI = $1$ (rapidly asymptotic) COR = $1$ DSI = $0$



If you want a discrete molecule as opposed to a crystal lattice, resolved camphor comes in around $\text{CHI} = 0.5$.  Resolved ${D_3}$-trishomocubane is a much better geometric example and is easily synthesized in large quantities starting with benzoquionone and cyclopentadiene (Diels-Alder).  If you have a methyl group sticking up from its ${D_3}$-axis, calculated $\text{CHI} = 0.996$.

Look at that methyl-bearing carbon!  It has no ${S_n}$ symmetries, for R must reflect or invert as S.  This chiral center's sense of chirality cannot be named.  Try doing it with CIP notation.



Uncle Al has been very naughty with geometric chirality, "[6.6]Chiralane: a remarkably symmetric chiral molecule," Symmetry: Culture and Science 19(4) 307-316 (2008).  Note that the core carbon atom has four rigorously identical substituents yet it is a maximally geometrically chiral center.  Chemical chiral nomenclature is fundamentally defective, for said chiral center (and the four to which it is attached) cannot be assigned a direction of handedness by any means, even in theory.

[A] http://osf1.gmu.edu/~bbishop1/CHEM%20814-579%20Stereochemistry%20Lecture%20slides.pdf  
  pp. 11-13.  
[B] J. Math. Phys. 40, 4587 (1999)   
  http://petitjeanmichel.free.fr/itoweb.petitjean.freeware.html#QCM  
[C] http://www.mazepath.com/uncleal/qzdense2.png for alpha-quartz  
  http://www.mazepath.com/uncleal/glydense2.png for gamma-glycine  
[D] http://www.mazepath.com/uncleal/norbors.gif  
    http://www.mazepath.com/uncleal/norone.png  
[E] Appl. Cryst. 33, 126 (2000)  
[F] J. Appl. Crystallogr. 19, 108 (1986)   
[G] J. Org Chem. 38(10), 1870 (1973) 
[H] Acta Cryst. B43 398 (1987) 
[I] http://elib.mi.sanu.ac.rs/files/journals/publ/69/7.pdf Section 2: eleven pairs of enantiomorphic space groups; 
 http://www.math.ru.nl/~souvi/papers/acta03.pdf  Section 3ff.