How do I create a teardrop in HTML?

How do I create a shape like this to display on a webpage?

I don’t want to use images since they would get blurry on scaling

I tried with CSS:

.tear {
  display: inline-block;
  transform: rotate(-30deg);
  border: 5px solid green;
  width: 50px;
  height: 100px;
  border-top-left-radius: 50%;
  border-bottom-left-radius: 50%;
  border-bottom-right-radius: 50%;
}

<div class="tear">
</div>

That turned out really screwed.

And then I tried with SVG:

<svg viewBox="0 100 100">
  <polygon points="50,0 100,70 50,100 0,70"/>
</svg>

It did get the shape, but the bottom part wasn’t curved.

Is there a way to create this shape so it can be used in an HTML page?