Final answer:
The specific gravity of rose quartz with a mass of 4g and a volume of 2 cm³ is 2. To solve for the specific gravity, density is calculated by dividing the mass by the volume.
Step-by-step explanation:
To find the specific gravity of the rose quartz, we use the fact that specific gravity is the ratio of the substance's density compared to the density of water.
Since the density of water is 1 g/cm3 at 4°C, the specific gravity is numerically equivalent to the density of the substance if we're using grams and cubic centimeters as our units.
To find the density of rose quartz, we divide its mass by its volume, which yields 2 g/cm3 (4g / 2cm3).
Therefore, the specific gravity of the rose quartz is 2.