---
title: "What the instruments and testers say: lesson quiz"
description: "Five questions on “What the instruments and testers say”, lesson 8 of Digital Gemology's Diamond vs moissanite course, in a new order every time, with an explanation for every answer."
url: https://digitalgemology.com/skool/quiz/diamond-vs-moissanite/what-the-instruments-and-testers-say
image: https://digitalgemology.com/img/og-digital-gemology.png?v=d224fb01
---

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> Site index: https://digitalgemology.com/llms.txt

[Diamond vs moissanite](https://digitalgemology.com/skool/quiz/diamond-vs-moissanite#lessons) · lesson 8

# What the instruments and testers say

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

Five questions on lesson 8 of Diamond vs moissanite. 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: A stone reads "over the limit" on a refractometer. It could be…
  ### Show the answer
  **b**: All three are above the 1.81 liquid.
2. Question 2: A round stone stays dark as you turn it face-down in a polariscope. Can you say it's diamond?
  ### Show the answer
  **b**: Straight down its axis, moissanite doesn't split light.
3. Question 3: A thermal tester beeps "diamond". What do you know?
  ### Show the answer
  **b**: Moissanite conducts heat like diamond.
4. Question 4: An electrical tester says "moissanite" for a blue stone. What's the right next step?
  ### Show the answer
  **b**: An electrical reading isn't diagnostic on its own.
5. Question 5: In the Polariscope, set diamond with strain, then moissanite at 90° tilt. Describe how each stone goes dark as it turns.
  ### Show our answer
  Diamond with strain: the patches go dark at different turns, so the stone never goes fully dark. Moissanite across its axis: the whole stone goes dark at once, four times a turn.

## More

- Next: [Lesson 9, Reports and paperwork](https://digitalgemology.com/skool/quiz/diamond-vs-moissanite/reports-and-paperwork)
- [The Diamond vs moissanite quiz](https://digitalgemology.com/skool/quiz/diamond-vs-moissanite), on the whole course
- [All Diamond vs moissanite lesson quizzes](https://digitalgemology.com/skool/quiz/diamond-vs-moissanite#lessons)
- [Diamond vs moissanite: all the lessons](https://digitalgemology.com/learn/diamond-vs-moissanite)