---
title: "DG-Miliano: past the 1919 ceiling: lesson quiz"
description: "Five questions on “DG-Miliano: past the 1919 ceiling”, lesson 8 of Digital Gemology's The history of the brilliant course, in a new order every time, with an explanation for every answer."
url: https://digitalgemology.com/skool/quiz/the-history-of-the-brilliant/dg-miliano-past-the-1919-ceiling
image: https://digitalgemology.com/img/og-digital-gemology.png?v=d224fb01
---

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[The history of the brilliant](https://digitalgemology.com/skool/quiz/the-history-of-the-brilliant#lessons) · lesson 8

# DG-Miliano: past the 1919 ceiling

Lesson quiz · five questions, in a new order every time

Five questions on lesson 8 of The history of the brilliant. The questions and the answers to pick from come in a new order every time you start.

Pick an answer, and the question marks itself. For a question that you answer in your own words, think of your answer first. Then show our answer and say whether you had it. Nothing is saved or sent.

1. Question 1: Name two things today's ray tracing does that Tolkowsky's method couldn't.
  ### Show our answer
  Any two of: works in 3D, not in a slice; sends light from many directions; follows rays through many reflections (up to 12); tilts the stone.
2. Question 2: Which three changes does DG-Miliano make to the Tolkowsky plan?
  ### Show our answer
  A shallower crown (32.0°), a three-tier pavilion with lower mains (38.3°), and a 96-facet girdle.
3. Question 3: DG-Miliano leads the T73 by 18 points in scintillation. Why should you read that number differently from its brilliance and fire?
  ### Show our answer
  The Wheel counts scintillation from the facets (177 against 73), but it traces brilliance and fire. The traced gains are +2 and +4.
4. Question 4: On which Wheel row does DG-Miliano trail the T73?
  ### Show the answer
  **b**: Tilt, 90 against 92.
5. Question 5: In the course table, which single step gave the largest rise in brilliance, and what technology was behind it?
  ### Show our answer
  Old mine to old European: 59 → 90, the bruting machine.

## More

- [The The history of the brilliant quiz](https://digitalgemology.com/skool/quiz/the-history-of-the-brilliant), on the whole course
- [All The history of the brilliant lesson quizzes](https://digitalgemology.com/skool/quiz/the-history-of-the-brilliant#lessons)
- [The history of the brilliant: all the lessons](https://digitalgemology.com/learn/historic-cuts)